Kindle Tips, Tricks, and Flaws
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(+  Blackberry 7" Playbook tablet)
(+ Nook HD 7" Android tablet)
            created 3/7/11
                  updated 4/7/15
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Kindle overview
Calibre
MP3 music on kindle
       A better way to play MP3 files on kindle
       A trick to get MP3 'audible' files to display in the right order
       My Amazon review of kindle as an MP3 player
       MP3 weirdness -- Kindle keesp playing when off
My main Amazon review
Transferring Html files to kindle
       Calibre is best for html
       Why doesn't Amazon's html conversion work for me?
Playing with the kindle directories & system files
        Author subdirectories
        Preferred download format
Kindle charging and battery info
Kindle crashes and reset
     How to crash kindle
Kindle 3 vs  Ipad 2
     Kindle Fire vs Ipad 2 vs Blackberry Playbook
Moving kindle
File types kindle recognizes
        Trying to get Amazon to convert a zipped html file
         Converting from pdf
Limitations of the built-in kindle PDF Reader
Kindle frustrations & issues
        Aa screen flaws
Keyboard shortcuts
Setting up collections
Setting up a 2nd kindle
         Transferring collections between kindles
Pictures display mode
Updating the operating system
More kindle weirdnesses
Complaints in various Amazon reviews
Links
    Kindle store
    Kindle games
    External kindle links
Appendix - Kindle
    Kindle gallery
    Kindle Problem Summary
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Blackberry 7" Playbook tablet
Blackberry Playbook Tablet
      Amazon review
      Web browser
      File management
      Video file formats
      Document handling
      Music file order
      Camera and video
      Screen capture
      Sound
      Playbook teardown
      Podcasts
      Privacy
         Solution to file privacy problem --- File Shield
      Reset
      Bluetooth keyboard
      WiFi
======================
Nook HD 7" Android Tablet
      Nook HD overview (my 7/26/13 Amazon review)
Nexus 7, Google (by Asus) 7" android tablet

Kindle
       I really like my first kindle (kindle 3 from Amazon). It's an e-book reader (w/text-to-speech), audio book player, MP3 player (w/stereo speakers), web access (w/WiFi), displays pictures, and 3 free Gbyte memory (accessible via USB cable) in a small, thin, light package with an incredible one month battery life. A lot of technology for $139. I have been researching and playing with it to see what it can do. While it is fundamentally a good product, it is clear that Amazon has in many ways crippled its user interface, and it remains quite buggy. This essay documents my findings.

Playbook
       While my Kindle 3 can theoretically access the web and display pictures, after playing with it for a while I came to realize that these two features on Kindle are pretty much of a joke due to its hardware limitations (scrolling cursor and slowly updating BW screen). For real web access (plus picture display and video) what is needed is tablet computer. They have all color touch screens, and models with lots of features, computing power and memory are available for not a whole lot more money than Kindle. So a year after buying Kindle, when I read on the front page of the NYT that Blackberry had just dropped the price of its feature packed 7" Playbook tablet computer from $600 to $250 (32 Gbyte model) I bought one. So my original Kindle Tips and Tricks essay has been expanded to include the 7" BB Playbook.

Kindle overview
       The kindle, now in its 3rd generation, is built around a 6" BW e-ink screen, which was good and is now better. This type of screen is very different from nearly all computer, Ipad, and cell phone screens in that it is not back lit. It is read using reflected ambient light, so it doesn't wash out in sunlight. It apparently takes little to no power to hold an image on an e-ink screen. A pulse of power is drawn to turn the page and rewrite the screen. Even when turned off the kindle displays one of its built-in author screens.

        The result of these screen properties is incredible battery life, one month claims Amazon if WiFi is turned off (& audio is not used). The screen is BW and not touch screen, so navigation around the kindle screen is slow using a pointer whose scrolling is controlled by a five way switch. Page turning is done with dedicated switches on the sides and below the screen is a simple QWERTY hardware keyboard.

        Amazon, of course, wants the kindle to be used to buy electronic books (many $10 each), but a huge number of older classic books are available free in electronic format. Html documents and pdf documents can also be stored and read on the kindle. Books generally don't take much memory, 1 Mbyte or less, which means 1,000 books fit into 1 Gbyte of memory! Amazon advertises that kindle memory can store 3,500 books. In practice this means that it costs basically nothing, but a little time, to load up the kindle with 100 to 200 old books you always wanted to dip into, and still have tons of room for music files and other documents.


Offical Amazon kindle 3 photo
Clearly shows sharp text and keyboard layout
Top: WiFi bars and battery status (upper rt) plus
time, free memory, custom text (name)
Left and right have idential forward/back page-turn keys
Aa key brings up text size and screen rotation options
WiFi kindle 3 is only available in this (charcoal) color

Calibre
       The kindle usefulness, and ease of use, is greatly enhanced by a highly regarded e-book organizational program called Calibre, written by one man (Kovid Goyal), who makes it available free. Amazon will tell you that the kindle supports only a limited number of file types, which do not include the common Epub format. Many of the file types Amazon says it supports it supports via conversion. Amazon does offer a free conversion process, where you email them documents, and it minutes later they are returned and show up on your kindle via WiFi, but I find this process clumsy and hit or miss. Html documents in particular are poorly supported by Amazon.

        Calibre can locally do file conversions that Amazon does remotely, but better Calibre can convert file types, like Epub and Html documents, that either Amazon will not do, or does not do well. At a upscale Sony store the first words out of a saleman's mouth was that the Sony ebook reader was better than the kindle because with the Sony you weren't confined to buying books from Amazon. Well with Calibre this is not an issue, it quickly and conveniently coverts common ebook formats, like Epub, (at least those without DRM) to a native kindle format. Thus Calibre greatly expands the range of books and documents that can be stored and read on the kindle.

         http://calibre-ebook.com/

Calibre news retrieval
        One of the neat features is that you can schedule it to regularly gather news from hundreds of sources worldwide and download it to the kindle. I have scheduled the New York Times, Wall Street Journal and Economist. For reasons I can't seem to fix Calibre always tells me that WiFi downloads via email to Amazon fail, but if I open Calibre and leave the kindle hooked up via USB for a few minutes I find that Calibre automatically uses the USB link to download the news articles. Cool... Calibre is one well written program. Amazon would be smart to hire the author as a consultant to fix the stupidities in the kindle user interface.

MP3 music on kindle
        It's possible to consider the kindle as an MP3 player that also doubles as an ebook reader. It has far more memory than is needed for books. How many people really want to carry around 3,500 books, which is the # Amazon advertises. Even if you have 500 books on the kindle you would still have 2.5 Gbyte free, enough room for 40 hours of music (1 min/Mbyte).

        In terms of hardware for music/audio the kindle provides two (stereo) speakers top rear (Ipad has only a single speaker, so is mono), a volume control and a standard (3.5 mm, stereo) headphone plug (bottom). If you place the kindle on your chest while reclining, surprisingly I find the (tiny) speakers do a reasonable job even for orchestral music.

        It's possible to make the kindle into a pretty good MP3 music player, but you never know this from kindle documentation. Amazon provides a 'music' subdirectory into which you are told to put the the MP3 music files You copy the MP3 files to the kindle from your computer via a USB cable. Amazon provides a total of two (all of two!) keyboard controls to play the MP3's: on/off toggle (Alt Space), and a step advance (Alt F). There is no display of the files, nor any way to control the MP3 music via the screen.

        The lack of a keyboard command to step backwards (complement to Alt F) clearly shows that Amazon has deliberately crippled the MP3 mode. It's really stupid. The explanation, such as it is, is probably, as the head of Amazon has stated, that he wants the kindle is to be thought of as an e-book reader. The MP3 mode is some sort of sop, or compromise, put there to provide some background music during reading, like other ebook readers provide. What it does is play the files only in the order they are loaded. The user has only one option: to step ahead one piece. When the kindle is reset, it begins playing from the beginning.

A better way to play MP3 files on kindle
        But there's another way to play MP3 music on the kindle. Load the MP3 files into the 'audible' directory. Now the MP3 files are treated like audio books. All the files are listed on the home page and can be gathered into collections. From this directory an individual MP3 music file can be selected, played, and repeated. You can step forward/back in 30 sec jumps, and on the screen the length of the piece is shown as well as a progress bar. This is a pure MP3 mode, there is no way to read while listening to MP3 music from the 'audible' directory, nor is there any way to automatically play a sequence of songs.

        One trick I leaned is to load all MP3 music into the 'audible' directory, arranged by subdirectory, and to gather up the files into collections (preferably reflecting the subdirectories). To continuously play the files in a subdirectory cut and paste the subdirectory (via USB) into the 'music' directory. The collection will then show 0 files, but later when the subdirectory is moved back to the 'audible' directory, the collection is restored.

A trick to get MP3 'audible' files to display in the right order
        I loaded all 27 Mozart piano concertos in MP3 format into the audible directory. Each movement is a separate file, so with some repeats this is 94 files (about 700 Mbytes). I have had these files on my computer for a while and long ago had renamed them in a consistent manner, so that in my computer directory they appear in order (#1 to #27). Of course, this is how I wanted them to wanted them to appear in the kindle too. But when I copied them over, this is not what happened, they displayed out of order, basically a scrambled mess.

        The reason very likely is that the kindle sorts on some of the tags, which tags I do not know. In my case since these MP3 files were gathered from various sources, the tags are inconsistent. I tried to use Calibre to fix the problem, but without success. Calibre allows metadata in multiple files to be changed, but after cleaning up some of the tags, Calibre refused to download the MP3 files. Calibre does not seem to be set up to handle audio books.

        I had earlier run into a similar MP3 file ordering problem with my Sansa MP3 player. I fixed the problem on the Sansa by deleting all the tags with an MP3 utility (MP3Tag). With all the tags blank the Sansa uses the only information it has to sort the files, the filename. I tried the same trick with the kindle and it worked! So to get the kindle to order MP3 music files in the 'audible' directory by filename, just delete all the file tags.

Ordering and naming MP3 files (update 4/3/11)
        My MP3 music files have long been organized by a descriptive filename and that is how I want them displayed on the kindle. The trick that I had used was to delete all tags using a free MP3 utility, MP3Tag. This seemed to work well, for example, my 91 Mozart Piano concertos pieces and 23 Gilbert & Sullivan pieces all displayed cleanly. But recently when I put more of my Mozart MP3 pieces into my Mozart Aria subdirectory of the audible directory, the kindle display of the files was a mess, some having only cryptic names like 'Track 13'.

        To figure out what was going on I used Windows Explorer. In explorer if you right click on the title bar you can turn on/off the display of a huge number of file properties. Normally the only properties I display are 'Date Modified', 'Type' and 'Size'. In the problem directory (Mozart Aria) I checked and the filenames were clean and turning on the display of 'Tags' I found it blank. But 'Track 13' and the other weird stuff had to be coming from somewhere, and I found it all in a property called, 'Title'. Sure enough when I checked 'Title' in the properly displaying directories it was blank.

Clearing titles, etc
       Bottom line --- To get kindle to use filenames for display all the relevant file properties need to be cleared. I didn't check each of these, but likely properties to clear are: Name, #, Title, Contributing artists, Album, Tags, Authors, and Composers. All of these are cleared in my master MP3 directory with tags removed.

Needed a reset
       After deleting all the files with tags and replacing them with the equivalent files sans tags, I found the kindle file list improved, but still not 100% clean. There were still some files listed as Track xx. What? This reveals another weakness of the kindle operating system. Some of the taged files had been put into collections, and it was like the collections remembered the tags, which I was sure were gone from the files. So I did a kindle reset and that cleaned up the file names.

How does kindle sort?
        How does kindle sort? I have seen nothing from Amazon on this, so I did some searching on 'tags' in the Amazon reviews.  One poster used Calibre to put in order the title of his seven Harry Potter books (#1 to #7) only to find them listed out of order. He reports kindle sorted them on publish date tag.

Having your MP3 cake and eating it too
        A flexible way to listen to MP3 music on the kindle is to copy your MP3 library to two places on the kindle: 'music' and 'audible' directories. From the music directory (using Alt space) the kindle will play through the MP3 library without stopping and you have the option to read a book. The MP3 library in the 'audible' directory will be displayed on the Home screen (or in a collection) as separate files, thus allowing any MP3 piece to be selected and played. This method, however, is wasteful of memory since each MP3 is stored twice.

        If you have a lot of music, the alternative (as I described above) is to put your music in the 'audible' directory organized by subdirectories, and then swap its subdirectories in and out of the 'music' directory for continuous play.

My Amazon review of kindle as an MP3 player (only slightly tongue in cheek)
        I tried to submit this as a 2nd Amazon review, but Amazon disallowed it, saying only one review/product, so I appended it to my main Amazon review.

        Amazon pushes the kindle as a book reader that also plays MP3s, but I think Amazon has got it backwards.  After playing with the kindle for a couple of weeks, I am convinced it's basically an MP3 player with speakers that also does books.
        Store 3,500 books in kindle 3 advertises Amazon. Come on, that's crazy. Except for a few people who might need to carry around a huge reference library, who is going to take the time to load, organize (& don't forget buy!) thousands of books and documents. A book reader doesn't need Gbytes of memory, no all that memory is for music and audio, where it's one minute/Mbyte.
        And in spite of Amazon's efforts to cripple it (no complement to Alt F, come on!), the kindle is a pretty good MP3 player. Not just headphones, but speakers. I found if you recline and lay the kindle on your upper chest the tiny speakers do a pretty good even with orchestral music.
        Look at the Amazon spec for file types supported in the audible directory. Do you see MP3? You do not. But try an MP3 music file in the audible directory and you will find it works fine. MP3 files in the audible directory are treated like audio books. They list on the Home page and can be put into collections. From this directory you have control of selection, repeats, 30 sec jumps(forward/back), all missing when you put MP3s in the music directory as Amazon directs.
        Most of my kindle memory stores MP3 music in the audible directory. The kindle supports subdirectories in the Audible directory, so you can file your music by performer or composer and keep it organized. I have a collection with Mozart's 27 piano concertos, Mozart (non-piano), Tom Lehrer, and Gilbert and Sullivan. One trick I learned is get MP3s to list by filename is to delete the MP3 tags.
        When I get bored listening, I can always read a book.
My main Amazon review
        When I submitted my kindle review to Amazon, there were already 17,000 (!) reviews and about 50 reviews a day were coming in. So why do it, because I and most others are really impressed by the kindle. I made my review different focusing on specific topics (HTML documents and MP3.) If I search MP3 or HTML in kindle reviews (now over 18,000 reviews), my review comes up first. Does Amazon adjust the found list to put the searchers reviews high up? Smells like it, though a few days ago I was coming up #3 not #1, so who knows. I experimented with several ways to transfer html essays written for my home page to the kindle. Within WiFi range a single essay can be (transiently) downloaded into the browser, of course, but what I wanted was a way to get all these essays cleanly stored in the kindle's memory.

Title ---  New world -- a lot of technology for $139 --- an MP3 player that does books (5 stars)

        My essays are technical, written in html and consist of text, tables, figures, internal links (for table of contents) and external links (to the web). In the html world text, tables, and links are in one file (html file), and the figures are all in separate files. Since page stepping through long documents is not the kindle's strong suit and since some of the essays are more than 100 pages, it was important that the internal links work on the kindle to allow direct jumps into the essays.
        I tried three methods. 1) USB file transfer of the html file with rename (.htm => .txt). The text is very readable and the external links work, but all the figures are lost and the internal links are dead. When I separately transferred figures, they were not found. 2) Convert the html essay to .pdf. I used OpenOffice (similar to Microsoft Word), then USB transferred the pdf file to kindle. This preserves the figures, but the links are all dead, and even with rescaling to a larger point size before the pdf conversion, the readability of the pdf text on the kindle was not the best.
        3rd and best is to transfer the html file to kindle using the free ebook management program Calibre. This gives very readable text, preserves the figures, and all the links (internal and external) work! Text-to-speech works too. Not perfect, but pretty good. The main negative I see is that figure size is fixed. The kindle allows the Calibre converted text to be scaled, but there is no way to enlarge the figures. During Calibre conversion figures are shrunk to fit, so a large figure may be very hard to read on the kindle. Tables get changed too, but not mangled, generally they remain readable.
        Here is the Calibre transfer/conversion procedure I used. Using left red Calibre icon add the html file to the Calibre library. Calibre is smart enough to automatically go the directory and pull the needed figures for the file and zips them all together. Right click the library file, select Send to Device. Calibre will ask if it should convert the file prior to download, say Yes. That's it.
        A moving kindle --- Took kindle for a little drive around the city, and it appeared to find quite a few WiFi hotspots (reporting 20 to 40 networks), but doing it again the hot spots seemed to have moved. I think what is going on is that kindle adds new WiFi networks as they come into range, but it only deletes out of range networks from its list when it does a periodic rescan.
        On MP3 --- Why isn't there a keyboard shortcut to step back, a complement to Alt F? Not having a back option is just stupid, it's like the MP3 function is being deliberately crippled. Even with modest memory use it's easy to have a hundred or more MP3 files. Any shortcut would do, even if logical choices (like Alt R or Alt B?) are not available.
        To those who don't know MP3 (music) files can also be placed in the kindle's Audio directory, where they are treated as audio books. Each MP3 song is individually listed, plays can be repeated, and the songs can be gathered into collections.
        Bug -- I found what I presume is a bug in the kindle's operating system (ver 3.1). MP3s once started continue to play when the kindle is turned off! Good grief. Or is this a design feature of the kindle!
MP3 weirdness -- Kindle keeps playing when off
        I found what I presume is a bug, a really weird MP3 related bug, in the kindle's operating system (ver 3.1). MP3s once started continue to play when the kindle is turned off (using bottom on/off slide switch)!  This is true for MP3s playing both from the 'Music' directory and from the 'Audible' directory. I confirmed that when an MP3 playing from the 'Music' directory (background music) ends, the next began, so presumably all the MP3s in the 'Music' directory will play (draining the battery) even with the kindle turned off.  Good grief! Is the kindle's MP3 mode even tested? Or is this a design feature of the kindle? Could this be kindle's workaround to its too fast auto power-off (about 10 min, very annoying) for audio books?

        Is is possible that when 'audible' books are playing and the kindle detects no keystrokes for a few minutes it still turns off? Yup. And instead of fixing the real problem (the auto turn off in this mode, or the far too quick turn off) Amazon kludged in a 'fix' to keep audio books playing even with kindle off?  I'd take a bet on this.

        I ran a test. I started a 13 min MP3 piece playing from the 'audible' directory, and then put the kindle down. Sure enough, after ten minutes the screen saver came up, and checking I found all the keys dead, yet the MP3 music continued to play until the end.

Transferring Html files to kindle
        I experimented with several ways to transfer html essays written for my home page to the kindle. Within WiFi range a single essay can be (transiently) downloaded into the browser, of course, but what I wanted was a way to get all these essays cleanly stored in the kindle's memory.

        My essays are technical, written in html and consist of text, tables, figures, internal links (for table of contents) and external links (to the web). In the html world text, tables, and links are in one file (html file), and the figures are all in separate files. Since page stepping through long documents is not the kindle's strong suit and since some of the essays are more than 100 pages, it was important that the internal links work on the kindle to allow direct jumps into the essays.

        I tried three methods:
            1) USB file transfer of the html file with rename (.htm => .txt). The text is very readable and the external links work, but all the figures are lost and the internal links are dead. When I separately transferred figures, they were not found.

            2) Convert the html essay to .pdf. I used OpenOffice (similar to Microsoft Word), then USB transferred the pdf file to kindle. This preserves the figures, but the links are all dead, and even with rescaling to a larger point size before the pdf conversion, the readability of the pdf text on the kindle was not the best.

Calibre is best for html
        3rd and best is to transfer the html file to kindle using the free ebook management program Calibre. This gives very readable text, preserves the figures, and all the links (internal and external) work! Text-to-speech works too. Not perfect, but pretty good. The main negative I see is that figure size is fixed. The kindle allows the Calibre converted text to be scaled, but there is no way to enlarge the figures. During Calibre conversion figures are shrunk to fit, so a large figure may be very hard to read on the kindle. Tables get changed too, but not mangled, generally they remain readable.

        Here is the Calibre transfer/conversion procedure I used. Using left red Calibre icon add the html file to the Calibre library. Calibre is smart enough to automatically go the directory and pull the needed figures for the file and zips them all together. Right click the library file, select Send to Device. Calibre will ask if it should convert the file prior to download, say Yes. That's it.

Is Calibre too clever?
        I later discovered that Calibre is perhaps too clever and does too much. I put a HS talk at the end of my html essay on 'Global Warming Physics' and loaded the file via Calibre to take to the school. When I looked at the end of the essay for the talk, it wasn't there! But it was listed in the table of contents and when I jumped to it I was somewhere in the middle of the document. What?

        It turns out that what Calibre did is tack my Global Warming essay onto the end of my Global Warming Phyics essay! Almost for sure this is because I have a link at the beginning of my Global Warming Phyics essay to my Global Warming essay. The link in Composer is to a local html file, which transforms online to 'Global Warming' essay on the server.

How Calibre zips up an [html file + figures]
        So apparently when Calibre zips up an [html file + figures], if it finds a link to a local html file it (sometimes!) goes and scoops it up too (plus all its figures). This is a problem for me, because all I am doing is putting in a link to cross-reference some of my essays. I don't want the essays merged on the kindle.

        While in this case the 2nd essay has been appended to the end, when I checked out my Global Warming essay, which also has a cross link, on the kindle I find it strangely messed up. On the one hand when I say 'go to the beginning' I find the Global Warming Physics essay, so it looks like it was put in first. But when I search for text at the real beginning of the essay, the progress bar show 1% indicating that it is at the beginning!

        Problem --- I suppose one (cludgy) way around this is to remove (or temporarily disable) the cross links before downloading to the kindle.

        I tried it, and yes this works. Temporarily disabling the (one) cross link gives a clean Global Warming Physics essay on the kindle.
        Maybe there is a way to prevent Calibre from following html links. Should search the Calibre site and maybe contact the author. On further checking I find my Photosysthesis and Cell Energy essays, which are also cross linked, seem to be OK, so I am not sure what Calibre is doing.
'Table of Contents' weirdness
        What I consider another weirdness is 'Table of Contents'. Not sure if this is the work of kindle or Calibre. I often put a series of internal links at the beginning of my essays. This is similar to what Wikipedia does and is a common way to add an index or table of contents to a document. It is important that this work right in a long html document because of the difficulty of paging forward on a kindle.

        On my Global Warming physics essay when I hit [Menu, 'Go to', 'Table of Contents'] kindle jumps to a text version (without formatting) of my internal links that is located at the end of the document. Yet my internal links with formatting are still there too at the beginning where they should be.

Why doesn't Amazon's html conversion work for me?
        (update) I used Calibre to convert all my html essays for kindle, so it was not important to me that Amazon's html conversion wasn't working for me (it clearly worked for others). Nevertheless it bugged me, so I ran a bunch of test to try and figure out why Amazon was not properly converting my html files. And I think I have figured it out.

Html conversion limited by design
        Amazon claims kindle supports html through conversion, but at best that claim is a stretch, because by design Amazon's support of html documents on kindle is very limited.

        1) The only way Amazon will convert an html document with graphics or pictures, which nearly all html documents have, is for the user to first zip all the figures and the text together and email them the zipped file. Not only would this be very time consuming, but I am no novice and I have neither the knowledge or tools to do this.

        2) Amazon limits the number of files in the zip to 25. Since every image in an html document is a separate file, this means means no more than 24 pictures or graphics in the documents. Amazon will only convert relatively short documents. In fact I got an email from Amazon that they rejected one of my essays (zipped by Calibre) for conversion since it had more then 25 files in it.

        3) Amazon tosses in that they will convert 'structured' html (.html and .htm). I had no idea what 'structured' html meant. I assumed it just mean plain old vanilla html code. 'Structured' is the kind of jargon that only programmers use and understand.

        My html code is created by an old, but very famous html editor, Composer, which was included with Netscape, so I presume it is vanilla html (no style sheets). The default file type is .htm (supported by Amazon). My html essays composed with this editor have been on the web for years, are well known to Google, display perfectly on every browser I have ever tried, and Calibre had no problem with them. In fact Composer is the wysiwyg editor that the Netscape browser was written with. It was built into Netscape, and a nearly identical editor continues to be available (free) with the latest generation of Netscape-like browsers (Sea Monkey).

'Structured'?
        A little research shows 'structured html' is html that follows a more structured format. There is mention of CCC (cascading style sheets) which is where code related to visual presentation is put. I know my html code has no CCC.
My conversion tests
        I had earlier tried Amazon's html conversion procedure several times, but it had never worked for me. I just tried Amazon's conversion again with a very simple all text html file. I ran these latest tests after getting a 2nd kindle. My 2nd kindle is set up as clone of my first kindle with the same documents and collections, both are registered to the same account and with the same conversion email addresses. I was interested as to how Amazon would address this.

In a few minutes my file was back via WiFi, but I am baffled by Amazon's response.

        1) There was no conversion (again!). The file on the kindle looks like raw html code.
        2) It is returned with a different filename! And the filename is absurdly long.
        3) It was sent only to my newest kindle. I found the file on the 2nd page of Home, the first
                        file after the last of my collections.

        Does Amazon not recognize the file as html? This is how it acts. The file type is .htm, doesn't that give Amazon a clue! I resent the file with several variation to see if I could get a conversion. I put 'convert' in the Hotmail title block, and I left subject blank (kindle user guide says it can be left blank, others recommend putting in convert). I changed file type from .htm to .html. I removed all spaces from the filename. Note of these changes made any difference, I always got back a file that displays as raw html code.

Here is why no conversion
       Finally I make a change that returned a properly converted html file. This change was run the file through (load, slightly edit, and save) the latest generation Netscape browser, the html editor built into the Sea Monkey browser. Sea Monkey comes from the Mozilla project to which Netscape released its code. The user commands and interface in the Sea Monkey editor are almost identical to the old Netscape editor I continue to use.

        This change worked! The received file displayed cleanly on the kindle. The Sea Monkey editor must be adding some prefix code that the Amazon html converter is looking for. So my html conversions were 'failing' because my html code was not 'structured' enough for Amazon's liking. And of course, they never emailed or warned me that this was the problem, even though they knew (or should have known as the lawyers say) that the code they were sending me would display as nonsense.

How a file is returned
        Usually a file was returned (via WiFI) in a few minutes. When my kindle was on and the Home screen was being displayed, I noticed a flash of the screen when it added the returned file. It also updates the # of items on top ('Showing all xx items'). It always put the returned file(s) after all my collections, which in my case put it on page 2 of Home. It marks them left as new and on the right with the email address.

        I would suggest an improvement to the user interface would be for kindle to make a little beep when it receives a converted file (or any file) from Amazon. As it is, you need to keep polling to see if the file is back.

Amazon changes filenames during conversion!
        I looked at the returned files in memory. They have been converted. They go out as .html (or .htm) and come back as .azw, but look (below) at what Amazon's conversion process does to the filename! What a kludge. How can you keep your kindle memory organized correctly with files that have been renamed like this.

        Filename as sent --- test (html).html
        Filename as received --- test html azw-asin_0f10b7a9dd63efaab88eae6c7fefa7b803b2dff9-0-azw-type_PDOC-v_0.azw

Why is the file just sent to one kindle?
        Still a mystery is why the files were only sent to one of my two kindles (newer). I thought I set them up the same. This will require looking around on the Amazon manage your kindle site to see what is the problem.

More than one file/email?
       Another conversion issue I explored was whether more than one file could be converted per email. I tried one time attaching two documents to an email. All the emails this day were coming back in 3 or 4 minutes, so when I got back only one of the two emails after ten minutes or so, it looked like the second was not coming, so I resent it. A few minutes later I got back two copies of this file (both with the same screen name).

Memory fiile deletion
        To clean up I deleted on the absurdly long filename files I had received from Amazon over a USB link. When I pulled the USB plug, in a few seconds the Home screen flashed and these files disappeared from Home. This is how kindle should act. It should be possible to delete files two ways: using the kindle interface or directly from its  memory using a computer.

Playing with the kindle directories & system files
Collections file
       I read collections are all specified by a file called 'collections.json' in the Systems directory. This is a short text file (4k, later 16k, in my case) that contains a list of file names with their paths. This is known I would say with high certainty, because one programmer has a downloadable program that allows files to be organized on your computer, and he makes this work by rewriting the 'collections.json' file.

        To see what would happen I renamed 'collections.json' file.  Powering up my kindle I was surprised to see my collections still there, unchanged. Checking the directory I find the file had been regenerated. The kindle OS must keep a hidden copy of the file that it reinstalls if 'collections.json' is missing. An odd thing is that the date on the regenerated file is correct, but the time is wrong (12 hours in future) even though kindle knows the correct time.

Audible directory
        My audible folder had MP3 music that I had put in collections. I then renamed the folder 'audible-old' and added a new 'audible' folder into which I put different MP3 music. What happened is that the new MP3 music shows up on the Home page and the old MP3 music is missing. Its audible/ music collection showing 0 files. When I reversed the directory names, the original MP3 music was back (in its correct collections) and the new MP3 music was gone.

        Thus its possible to have multiple Audible directories with different names. Only the directory with official  kindle name of 'audible' will be visible. I presume the same thing would work with the 'Documents' folder. Yup. The contents of the documents folder can be rendered invisible by just renaming it, says 'documents-old'.

Specific directory names
        The kindle is programmed to only show files stores in directories with specific names: 'documents', 'music', 'audible', 'pictures'. My kindle 3 came preprogrammed with only with the first three (no 'pictures' directory). I read about 'pictures' directory in a kindle article, and sure enough adding this directory allows pictures to be show up on Home and be added to collections. Why does Amazon not preprogram this? Too buggy?

        Note two subdirectory names are plural ('documents' and pictures'). As a fun test, I removed the plural ('pictures' => 'picture') and sure enought all my pictures were gone.

Use as a memory stick
        Since other directories and their contents are not displayed (on screen), you can use spare kindle memory like a memory stick. Use it as remote backup source for critical files. These directories, while hidden from the screen, when accessed via USB and Windows Explorer look and act like normal Windows directories.

Music subdirectory tests
        I moved some of my music MP3 files to a new subdirectory under Music called Mozart-bassoon. There was no change in the dates and the current piece playing (Alt space) did not change.

        I renamed 'music' directory to 'music2' and my background music was gone. I added back 'music' directory and moved the Mozart-bassoon subdirectory to it. Now the root of  'music' is blank with MP3 files only in the Mozart-bassoon subdirectory. When I start background music (Alt space), the mozart bassoon concerto begins.

        This means subdirectories are OK in the 'music' directory like in other kindle directories. It also means you can sort your MP3 music into subdirectories (in my case Scott Joplin, Tom Leher, Gilbert & Sullivan, etc) under the say 'Music2' directory, which is ignored by kindle, and then with a computer shift them in and out of the 'music' directory to make them active. This is how I have reorganized my MP3 files for background playing.

(update)
        I later realized a better use of memory is to store unused MP3 music subdirectories, i.e. music files not currently being played from the 'music' directory, not in a hidden directory (Music2), but in the 'audible' directory where all the MP3 pieces can be accessed individually.
        Note my tests confirm what I have read, that all the kindle (user) directories support one layer of subdirectories, which display in a flat manner on the Home screen. Thus organizing your files (music and documents) in subdirectories is the way to go, especially if you want to manipulate your kindle via your computer over USB.

Do .mbp files indicate 'Last page read'?
        If you look at memory, you find a lot of documents have an associated .mbp file. Do .mbp files indicate 'Last page read'? My tests indicate they do. If you delete an .mbp file, you reset your location to the beginning of the book, the kindle later automatically regenerates the file. My tests show its deletion did not affect the book's status in a collection. I found a forum reference that says the .mbp file (an associated .mobi file) in kindle contains:

                    -- the position of the last read page (the resume reading)
                    -- annotations: bookmarks, highlights, notes, modifications, links, etc... that you created in the book
                    -- metadata if you edited them in the Reader Desktop
                    -- reading lists this book belongs to (but not collections my tests show)

        In kindle memory most document files are accompanied by one or two short (1k) files with the same name, but different file types. One of these is the .mbp file (it accompanies the .mobi file). As a test, I jumped into the middle of a book to update the last page read and verified the progress dots under the file name updated. I checked the associated book .mbp file and found it carried today's date (but wrong time), then I deleted the .mbp file.

Aside --- Why are the file times often (always?) wrong on my kindle files? My kindle knows what time it is. Does the kindle OS not use file times, only file dates?  This appears to be the case.
Surprisingly I found the progress bar unchanged (Alt Z and Alt G refreshes made no difference), but when I said 'Go to last location', it dumped me into the beginning of the book. Returning to the 'Home' screen I found the progress bar had been reset to the beginning. When I checked memory, I found the .mbp file had been regenerated. To confirm .mbp file carries location information I copied back the old .mbp file and sure enough the old jump location was restored as was the old progress bar.

What are .apnx files?
        All of my converted html files and some others have an associated .apnx file. Poking around forums I find that .apnx files contains page numbers for kindle. The file is generated by Calibre as part of the conversion process. It apparently signals to kindle how to break the document into pages. As I page through my converted html documents, the only apparent paging I see is related to figures. Paging might be used to keep figures from being split between pages, otherwise the text runs continuously, which I think is fine.

Page numbers (sort of)
      I checked one of my Calibre converted html files (Atoms) for page numbers, and it has page numbers (sort of). The page numbers don't show, but clicking 'Go to' it tells me the document has 1 - 139 page numbers and 1 - 2,124 location numbers, and I can enter either. Entering 'Go to' page 100 does take me about 70% into the document. When I play with start at page 2 or 3, I find the location somewhat variable. I stepped manually to page 3, then used 'Go to' page 3, and find they don't go to exactly the same location. I can only conclude page numbers can be a little squishy. (I read the page numbers for html documents are generated by just counting words or characters.)

Where is the first page
        One thing I find surprising is that kindle can't reliably seem find the beginning of documents. Yes the beginning! In my Calibre converted html essay (Atom) kindle told to 'Go to' the 'beginning' opens around page 2 to 3. What? Not only is the Table of Contents at the beginning skipped, but the first paragraph or two of text is skipped! To reach the true beginning I need to page back about three pages. (Don't know if this is kindle's fault or Calibre's.)

        Pdf books, like some Google books, appear to have their own short associated file (.pdr). I have not researched what this file does, but it's probably doing the same sort of things as the .mbp and .apnx are doing for the (converted) html files.

Author or category subdirectories
        I read that in the kindle one layer of subdirectories is supported in the 'documents' directory. I ran some tests and confirmed this for 'documents' and found it to be true also for 'audible' and 'pictures' directories. I did not test the 'music' directory. In these three directories all the files in the root and one subdirectory down show up on screen.

        Thus it is it possible (& desirable) to organize your files in subdirectories. In fact this is how Calibre by default stores books in the 'documents' directory. For example, it stored the book Origin of Species in a 'documents' author subdirectory named 'Darwin, Charles' using tags it found in the file. I have organized my MP3 music files in the 'audible' directory the same way.

        Author or category subdirectories are a good way to keep kindle files organized.

Preferred download format --  Kindle vs Epub
        Searching for a free Mark Twain book ('Innocents Abroad') I found it on Project Gutenberg, where it is available for download in many formats, including Kindle and EPUB (both with images). I knew Calibre could convert the Epub format for the kindle. Wondering if the two formats would look any different, I ran a little test and downloaded both. The Epub file was download (with conversion) to kindle via Calibre, and I directly copied .mobi (kindle) file from my hard drive to the kindle memory.

        The first page of book text looked the same in both files, but there was a winner here: Epub with Calibre conversion. The reason is that kindle file from Gutenberg comes with an annoying Gutenberg header that is very long (many pages). Either it is not there in the Epub version or Calibre stripped it out. For whatever reason the Calibre converter Epub book is cleaner on the kindle.

        Lots of free books here:
         http://www.gutenberg.org

Kindle charging and battery info
        There are sites online that show the circuit board of the kindle. Pictures I saw on two different sites of various models of the kindle show it with a (rechargeable) lithium-ion 3.7V, 1,530 mah battery. This is a battery that can output [5.7W = 3.7V x 1.53A] for one hour, 57 mw for 4 days, or about 10 mw on average continuously for three weeks. The battery in the 6" kindle 3 is probably the same or close. (For comparison the battery in the power hungry Ipad is about 4 times bigger.)

(Update)
        Found this video made by a company that sell replacement batteries (NewPower99.com) opening a kindle 3 and changing the battery. The original Amazon battery is clearly marked lithium-ion 3.7V, 1,750 mah (6.5 Wh), which is a somewhat higher capacity than the batteries (above) found in earlier kindles.

         http://www.youtube.com/watch?v=NxKqr3t35HM

        Here are screen captures from the NewPower99 YouTube video (above) showing the kindle 3 battery and how to open the case. (NewPower99 kindle 3 replacement batter is $40 and slightly higher capacity 1,900 mah)

kindle 3 battery, 6.5W (3.7V, 1,750 mah)


prying open kindle 3 case

        The kindle can be recharged from the USB port. This port outputs 5V at 0.5A max, which is a maximum power of 2.5W. The AC charger delivered with my kindle 3 is marked 4.9V, 0.85A output, which is 4.2 W, somewhat higher than USB port. Thus the source power limits say to recharge a fully discharged kindle from the USB port will take at a minimum 2.5 hr from USB and 1.5 hr (could be longer) with the AC adaptor. These numbers are generally consistent with quoted recharge times.

        The fact that the screen of an off (or sleeping) kindle always displays an image indicates that its screen draws essentially zero power displaying a fixed image.

        I am wondering how much power it takes to refresh the screen when playing MP3s from the audible directory. The refresh can be seen to be very frequent, every one to two seconds, much more frequent than reading a book. The only thing the refresh is doing on the MP3 screen is updating two tiny screen objects: time clock and the progress bar. This refresh does, however, look different from the normal book 'page turn', where the whole screen flashes black. In the MP3 screen update there is no flash to black.

        If a partial screen write can be done, this might be OK, but if this is a full power screen update, then this near continuous rewriting of the screen is a needless waste of battery power. The updates on this screen could easily be every 5-10 seconds with almost no loss of performance, yet with a potential reduction in screen battery power of 80-90%.

Kindle crashes and reset
        I have had my kindle 3 crash two or three times. This little YouTube video mirrors the experience I had trying to figure out how to recover from a crash and reset the kindle. This guy never figures it out, and I didn't either the first time. Recovery requires holding the power switch a long, long time (maybe 30 sec). The problem as the video shows is that you get confusing signals. First the green light flashes (I still don't know what this means). Next the screen goes blank. My first time I put down the kindle when the screen went blank, but it just stayed blank. The trick is even after the screen goes blank you need to continue holding the power switch. Another poorly designed feature of the kindle interface.

         http://www.youtube.com/watch?v=YJrip2_l4rI&feature=related

Amazon 'soft reset' procedure screws up the kindle
       (Update) I searched 'kindle', 'flashing light' and found the instructions (see below) on the Amazon kindle site to recover if your kindle is not responsive. Apparently this is a 'soft' reset, because following this it says if your kindle is still not responsive then it says hold the power switch for 15 seconds to get a 'hard reset'. I did below with the kindle working fine and playing an MP3 piece in the background.

            * Slide and release the power button. The LED light that surrounds the power button will display green for two seconds.
            * Shut down Kindle by sliding and holding the power button for five seconds. The LED light will blink three times. (yup, but what is the point of this blink. What does it indicate?) Wait for the screen to go blank, then release the power button.
            * Turn on the Kindle by sliding and releasing the power button.

        Yikes. I do above on a healthy kindle and it is now screwed up. Unbelievable. It starts and I can read books, but when I go to Experimental to restart the background music, which was playing when I did the procedure, the background music will not start! Another poorly designed feature of the kindle interface.

        Instead of holding the power switch for 30 sec, I found Menu entries: 'Restart' and 'Restore Factory Defaults'. (These are apparently context sensitive, because I can't find them in a normally operating kindle.) I hit Restart, which apparently is software triggered 'hard' reset as the kindle appears to go through the same 1 minute reboot the switch causes. Good, all my collections remain intact and music is back, starting from the beginning.

        My guess is 'Restore factory defaults' is destructive and is going to wipe out memory. Yup, I read that this is what it does. People who are selling their kindle use it. A Y/N warning box does pop up telling you it will wipe out downloaded and transferred items.

How to crash kindle
        In my case trying to access my email (do you suppose this is a common use of the kindle browser) is a guaranteed lockup. Each time it is the same. I accesss Hotmail site (easy using my html homepage) and enter my email address and password. Up to this point all is normal. My (correct) inbox then comes up, and crash... kindle is frozen, unresponsive to any commands. Recovery requires a hard reset (with power switch), then the password is forgotten and the whole process repeats.

WiFi Primer
       The WiFi spec on the kindle is support for 802.11g and 802.11b. This means it operates in 2.4 Ghz band and supports 54 mbyte/sec 'g' transfer rate as well as the slower (11 mbyte/sec) 'b' transfer rate. Apple Ipad WiFi also operates at 2.4 Ghz and in addition to supporting  802.11 'g' and 'b' it also supports the faster 'n' (150 and 300 mbyte/sec).

Kindle 3 vs  Ipad 2 (WiFi versions)
                                                                  Kindle 3                             Ipad 2
                                                        ----------------------             ------------------------
                screen size (diagonal in)                6                 vs                  9.7
                size  (in)                          7.5 x 4.8 x 0.34         vs         9.5 x 7.31 x 0.34
                resolution                        800x600 (167 ppi)   vs           1024 x 786 (132 ppi)
                memory  (GByte)                            4                vs           16      (32 and 64 option)
                weight                               8.5 oz  (241 gm)      vs           1.33 lb (601 gm)
                battery life                                  one month     vs           10 hr
                battery (watt-hr)                              6.5             vs           25
                battery charge             USB or AC adaptor      vs            USB or AC adaptor
                cost                                                 139             vs            477   (576 for 32 Gbyte
                                                                                                                      607 for 64 Gbyte
                                                                                                            40 for cool magnetic cover)

        Ipad has a color, back lit, touch sensitive display. The Kindle screen is BW, not touch screen and not back lit, with slightly higher pixels per inch. Thickness of both units (1/3rd inch) is exactly same, Ipad is more than twice the weight of kindle. Both screens rotate 90 degree, IPad automatically and kindle manually. Ipad has thousands of applications you can run on it. Kindle is closed, you get the functionality that Amazon gives you and nothing more. Finally, kindle, although a much more limited (and frankly less sexy) machine, is much cheaper than Ipad (only 1/3rd the price of the cheapest Ipad).

        Kindle has a (mini) USB port that supports charging and access to kindle memory allowing documents to be added and deleted. I am not sure if Ipad 2 has a (mini) USB port or not. At first I thought it did, because its spec says it can be charged via USB, but I don't see a (mini) USB port in the spec drawings, just a 30 pin dock port. But included in the Ipad box is this: Dock Connector to USB Cable. So is this a USB port with normal USB computer functionality, can you connect a USB keyboard for example? I researched this.

       A Dec 29, 2010 article (prior to Ipad 2 release) said it is rumored that Ipad 2 would have a USB port. The implication being that the orginal Ipad does not have one. (Apparently Apple in the past provided some sort of adaptor for its 30 pin dock to allow Ipad to be charged via USB, but it provided very limited access to Ipad memory.)

        The Ipad 2 does not have a real USB port, but it does have a (sort of) USB port for cameras. Apparently the Ipad via quasi-USB does not show up as an auxiliary memory device, which makes sense because it is fundamentally a computer. Hackers are getting some USB keyboads to work through this port, so it looks like Ipad 2 USB is somewhat of a cludge. The problem apparently is that it only provides low power, not enough for some keyboards. Ipad has built-in wireless bluetooth so this is the official way to add an external keyboard, and Apple sells several different bluetooth keyboards ($25 to $70).

Kindle Fire vs Ipad 2 vs Blackberry Playbook (2/21/12)
        I finally joined the tablet world. Comparing Kindle fire and Blackberry Playbook: same size, same cost, same computer chips inside, even made by same company in Taiwan, but the Playbook is far better (better sound, cameras, vol control, x2 memory, bigger battery, HDMI port, bluetooth, even GPS) and is a real computer not an Amazon ordering device. Blackberry is like a smaller screen version of Apple Ipad-2 for less than half Ipad price, and it does Flash and multi-tasks, neither of which Ipad can do. Was introduced 10 months ago for $500, and price has been cut to $200. NYT in front page story yesterday claims it is being sold at possibly a $200 loss. I reviewed specs carefully and read all the reviews (Amazon reviews good) and see no obvious weakness. I bought the version with double memory (Blackberry 32 Gb for 250. (2/21/12 email to my brother)
                                                                 Kindle Fire                              Ipad 2                                  Blackberry Playbook
                                                        ----------------------             ------------------------                   -------------------------
                screen size (diagonal in)                7                                      9.7                                                    7
                size  (in)                          7.5 x 4.7 x 0.45                      9.5 x 7.31 x 0.34                              7.6 x 5.1 x 0.40
                resolution                    1024 x 600 (170 ppi)                1024 x 786 (132 ppi)                    1024 x 600 (170 ppi)
                memory  (GByte)                  8 (6 available)                  16      (32 and 64 option)              16 (32 and 64 option)
                RAM                                      512 Mb                                                                                          1 Gb
                weight                            14.6 oz  (413 gm)                   1.33 lb (601 gm)                             15 oz (0.9 lb)
                camera(s)                                  none                                two  (grainy, no Mpixel rating)       two (5 Mpixel, 3 Mpixel)
                ports (beside USB)                  none                             (Ipad 2 does not have real USB)        HDMI (mini)
                speakers                                  stereo                              mono                                                  stereo
                microphone                              no                                    yes                                                     stereo
                GPS                                           no                                    no                                                       yes
                multi-tasking                                                                     no                                                      yes
                battery life                              8 hr                                  10 hr                                                  6-8 hr (manuf) (10 hr reviews)
                battery (watt-hr)                    16.3                                   25                                                      20
                battery charge                 USB or AC adaptor                USB or AC adaptor                         USB or AC adaptor
                cost                                          199 (8 Gb)                      487 (16 Gb) (582 for 32 Gb)        199 (16 Gb), 249  (32 Gb)
                                                                                                                 670 for 64 Gbyte                      299 (64 Gb)
                                                                                                            40 for cool magnetic cover)

        More on Blackberry Playbook in Appendix

Netbook comparison
        I recently had a chance to play briefly with a sub $300 10" netbook computer. In linear dimensions it is not much bigger than the Ipad2, though it's a lot thicker and heavier. Here are the numbers for the Toshiba NB505-N508BL 10.1-Inch Netbook ($278).

                                                      10" Toshiba Netbook                       Ipad 2
                                                        ----------------------             ----------------------------------
                screen size (diagonal in)              10.1             vs                   9.7
                size  (in)                           10.3 x 7.48 x 1.4      vs          9.5 x 7.31 x 0.34
                resolution                               1024 x 600        vs           1024 x 786 (132 ppi)
                memory  (GByte)                   1 Gb ram           vs           16
                                                        250 Gby hard drive
                weight                                            2.9 lb           vs           1.33 lb
                battery life                                     8.3 hr          vs           10 hr
                battery (watt-hr)                               48             vs           25
                battery charge                           AC adaptor      vs            USB or AC adaptor
                cost                                                 278             vs            477

        Toshiba has a real, full size, mini-style keyboard, three USB ports, VGA port, and Window7 starter (32 bit). However, no (internal) CD/DVD drive, so requires an external DVD drive to play DVD movies and to install programs from CD's ($30, 8 oz for a USB powered external drive). However, for traveling video files (.ts files) can be copied over to its good size hard drive. One Amazon reviewer says this about Window7 Starter:

        "The software problems you all are having are because you're using Windows 7 STARTER EDITION. Microsoft made this version crappy on purpose so that you would upgrade to a version that allows you to actually get stuff done. "
Kindle micro-USB connector
        Kindle comes with charging cable, but like many people I have mini-usb charging cables for other devices lying that I thought would be useful for the kindle. I was planning to use one in the car, where the Amazon supplied cable does not work. When I went to plug in the USB cables I use in my car (for the navigation system and MP3 player), I found neither would fit. What has happened is that as devices have thinned (kindle is only 0.33"), a thinner connector is required. My charging cables are mini-USB, but kindle 3 has a micro-USB connector.

Car charging
       For charging my kindle 3 I keep in my car I bought 'Motorola Mini-USB to Micro-USB Charger Adapter' ($3), which comes with a little loop so you can hang it on the charging cable. (update -- while two reviewers reported it worked for kindle 3, it did not work for me. Doesn't appear to seat fully into kindle and kindle gives no indication that it is charging.

        Next sought out and bought a dedicated kindle 3 car charger --- CrazyOnDigital Kindle 3 Accessories Auto Car DC Charger ($2 + 3 shipping). Sure it's one more cable, but since kindle needs to be charged so infrequently, the cable can be kept stored.

Moving kindle
        Took kindle for a little drive around the city (later I learned this is called 'wardriving'), and it appeared to be finding quite a few WiFi hotspots (reporting 20 to 40 networks), but doing it again I found the hot spots seemed to have moved. I think what is going on is that kindle adds new WiFi networks as they come into range, but it only deletes out of range networks from its list infrequently when it does a periodic rescan, so a long WiFi list from a moving kindle doesn't necessarily indicate a WiFi hotspot. It's more likely to be an artifact of how the kindle assembles its list of WiFi networks.

inSSIDer utility
       What is really needed to see what WiFi channels are around is a free computer utility like inSSIDer. It updates quickly and shows not only the channel names and signal strength, but also the WiFi channel, security level, operating frequency band and transfer rates.

File types kindle recognizes
        Here is Amazon documentation for the 'Files Kindle Recognizes':

Native
       Documents: Kindle (.AZW, .AZW1). Text (.TXT),
                            Unprotected Mobipocket (.MOBI, .PRC)
        Audible: Audible (.AA, .AAX)
        Music: MP3 (.MP3)
With email conversion
        Structured HTML (.HTML, .HTM)
        PDF (.PDF)
        JPEG (.JPEG, .JPG)
        GIF (.GIF)
        PNG (.PNG)
        BMP (.BMP)
        Microsoft Word (.DOC)
        RTF (.RTF)
What Amazon doesn't tell you about file types
        Well, basically the native group is a lie, because MP3 files placed in the Audible directory are also recognized. As a test, I renamed .mp3 files in the Audible directory to .aa and .aax, but then kindle tells me it cannot open them. Others before me had figured out that html files can be transferred and renamed (.html => .txt), and the kindle will then display the file not as html code, but as readable text. Notice Amazon does not tell you this either.

Trying to get Amazon to convert a zipped html file
          Amazon says that the files (above) it supports can be zipped together, so it seems like this should provide a way to get Amazon to load an html document with figures. I noticed that Calibre makes and stores such zipped files as part of its conversion process, so I emailed one of the zipped files to Amazon (atom.zip), but it was never returned. What I got was an email message from Amazon saying they could not convert it since the maximum number of files it contained was too large. I had no many ideas how many figures it continued, but Amazon in their email messages lists only eight! So I counted the figures and found 28, which for me is not a particularly long essay, but it is just slightly higher than the maximum of 25 that Amazon will convert.

        In my opinion the Amazon conversion process for html files is useless. First they require you to generate a zipped file. Prior to Calibre I did not have a tool to do this. But the killer is the restrictions are so tight that only very simple documents can be converted. I tried two simple html documents, and Amazon did not convert them correctly either! On the other hand Calibre took all my html essays with figures some much longer than the essay Amazon refused to convert, and converted them all seamlessly into kindle readable documents.

        I have yet to see Amazon convert an HTML document properly. Twice I have sent a simple html file to Amazon for conversion (once with Convert in the title and once with it blank), and it both cases the delivered file was raw html. Yet Calibre can take a complex html file with figures and tables and on the fly as it downloads convert it beautifully.

(update)
        I later figured out why Amazon was not converting my simple, short html documents. Notice above Amazon says it will convert not (just plain old) html, but 'structured' html. Another Amazon gotcha! Amazon will accept not any old html code, but only html code from specific editors that 'structure' it to its liking. (See below for the gory details on how I figured this out.)
Converting from pdf
      The author of Calibre points out that conversion of pdf files to other formats is often difficult. Amazon offers to do this (as does Calibre), so as a test I sent Amazon two different types of pdf documents to convert. One a four page IRS 990 form with typed in boxes and the other a professional (IEEE) paper I wrote in two column text with embedded figures.

Amazon tries
        The Amazon IRS 990 form pdf conversion was a disaster. It was returned as a three page document (first page missing)! Text scaling did nothing and the pdf magnify was gone. Unreadable, far worse than the original. (update --- found a reviewer online reporting the same problem, the cover page missing. Does Amazon ever test its software?)

        On the other hand Amazon's pdf conversion of the two column technical article came out pretty good. The text is scalable and can be auto-read and the figures are good.  Paragraph spacing had some problems so formatting was not 100% clean, but the conversion did improve the readable of this pdf document on a kindle over the pdf original.

Calibre tries
       I had Calibre convert the same two column technical article as Amazon and in this case the Calibre conversion was poor compared to the Amazon conversion. One of the rare cases where Calibre did not do well. It looks like Calbre didn't recognize that the pdf document was in a two column format. The text was a scrambled mess and figures were scattered willy-nilly. (Maybe this explains the author of Calibre saying pdf conversions are tough, he knows his pdf converter is not the best.)

        Bottom line --- Try both Amazon and Calibre for a pdf conversion.

Limitations of the built-in kindle PDF Reader
No table of contents support
        The pdf reader compared to the usual pdf reader found on a computer is pretty limited. A huge limitation is that neither internal (table of contents) or external links to the web work. One reviewer wrote that he needed a pdf reader for data sheets, many of which come with a table of contents, which are internal document links, and he protested strongly that the kindle pdf reader was to him useless as the table of contents in the pdf data sheets don't work. I suspect (& believe I read) that Amazon specifically crippled the pdf reader by disabling local links in kindle 3, links which may have worked on earlier kindles, to protect digital rights of publishers.

No adjustable gain box
        Another limitation of the pdf reader is setting the gain and moving the screen around. The As key shows five gain settings are available: fit-to-screen, 150%, 200%, 300% and actual size. I have no idea 'actual size' means and it often seems to be the same as one of the other selections, so really there are only four useful gain settings. What is desperately missing is the standard pdf gain box, where you can type in a gain, or maybe toggle it up/down in small increments. Documents always appear to start in fit-to-screen. This is nearly always unreadable, so some fooling around with gains settings is required nearly every time you open a pdf document. The three % choices bring up a screen outline, but only after you make a selection. This is bad, as this is total trial and error for every document. What is needed here is to be able to see the outline box size prior to making a selection. This is how the text size selection works. If you could see the screen outline before selection, it would be a big improvement.

No easy way to move around a page
        With such a small screen on the kindle pdf documents normally need to be magnified, but what is so frustrating with the pdf reader is that there is no easy way to move a magnified screen around the page. What's needed are keyboard commands (preferably marked on keyboard) for rt/left and up/down. The keyboard commands that normally move the screen right/left (Alt H/J) either don't work, or don't work reliably, in pdf documents.

Pdf search flaw(s)
        Tried searching a pdf document for first time and find it has a huge stupid flaw and a smaller flaw. The smaller flaw is that the found word is hard to locate because it is not clearly highlighted. There is just a light gray background.  The bigger, and really annoying, flaw is that every search cancels the pdf gains setting! The document I am searching is a two column professional document, which in 'Fit-to-screen' has really tiny text size. It needs to be magnified to be readable (with my eyes). Yet regardless of the gain setting, when I enter the search phrase the results are displayed with the gain switched back to the default 'Fit-to-screen'. This is ridiculous. There's no reason the gain setting cannot remain where I set it with the screen adjusted to display the search word. Does Amazon ever test its software, or is it that they just don't care that their pdf reader works poorly?

Search finds a variant of the search word
       Another search stupidity --- kindle pdf search finds a variant of the search word. The pdf document on the kindle I am searching contains multiple instances of 'sense' and 'sensing'. A kindle search for 'sensing' finds both 'sensing' and 'sense'! Adobe, who I think knows a thing or two about pdf documents and how to search them, their pdf reader when searching for 'sensing' finds only 'sensing' and not 'sense'. This is also true for the non-Adobe pdf reader built into Google's Chrome browser, and I think Google knows a little something about search! The same flaw seems to occur with any kindle search.

Another (general) search weirdness
        Searching for a word in a Calibre converted HTML document kindle labels the found locations by page number and location number, for example "page 22, location 332". Now I know there are no page numbers in the original document, because I wrote it. Anyway I search for "page 22", which it just identified (!), and it is not found, so I search for "page" and again not found. If there are no page numbers in the document, why is it identifying locations of the search word by page number? Good grief!

        The explanation for this 'page' issue may be that some html conversion programs (html => pdf) sometimes count words and quasi-paginate the document.
        I checked the kindle page count for a Calibre converted html document against page preview in IE browser, which shows the total pages. IE with reasonable point size has a total of 22 pages, whereas kindle has 52 pages. It looks like the kindle page count is basically (an estimated) count of pages as displayed on the small kindle screen.

Kindle frustrations & issues
        Using the Kindle brings some real frustrations too:

Slow scrolling
       The lack of a touch screen means the the only way to select things is to direct a pretty slow moving pointer up/down and right/left using the five way switch. The scroll speed is apparently dictated by the update rate of the ink screen. There appears to be no intelligence in the algorithm, it doesn't ever jump, it just steps along. The five way switch is also tricky when doing a lot of scrolling because it is easy to let your finger slip a little and hit the center button. This is relatively unimportant in reading books or selecting MP3 music files, but is a real problem with most native web pages.

Multiple page turns
       Another major lack is a clean way to step quickly through pages. This is not only a book issue, but a home page issue too. For example, currently after loading up my kindle with a lot of music files, but before have I collected them into collections, my home page has 35 screens! Why isn't there some keyboard shortcuts to say jump 5 or 10 screen/pages at a time. To the best of my knowledge there isn't. You need to step through them one at a time! I would estimate it takes about 1.5 sec for a new screen to appear.

        If I push the page button fast, says five times and count, then in 2 to 3 seconds page six comes up. But this is crude. Even cruder is holding down the page button. When I do this I see at the bottom of the screen I see it flash 2,3, 14,19,28,35. Well that's clean! The display lag is so great that this method is pretty useless, maybe its OK for going to the end of a short document, but that is about it. How after three generations can there be almost no decent way to speed up page turning?

        For my html essays (some > 100 pages) there is a a work around. The work around here is to add a table of contents at the beginning of the document, and then keeps these internal links active with a Calibre conversion.

30 sec jump
        Another example of the poorly designed kindle user interface is the 30 sec forward/backward jumps on the Audible/MP3 screen. When playing an MP3, I scrolled over to the jump forward button and (mindlessly) did a few clicks thinking I would advance into the piece a few minutes. It didn't work. But isn't this what this icon is for?

        Here is the problem. The two jump icons are on either side of a pause icon. When a jump icon is clicked, the cursor maddeningly jumps back to the pause icon (in the center) every time, so a double click just advances 30 sec and pauses. To move forward though an audio/MP3 file in 30 sec jumps you must alternate right and center clicks. This is just ridiculous. The cursor should stay where you put it, then five clicks would advance 2.5 min.

        And speaking of jumps why not add say five minute jumps. Even better add icons to jump forward/back to the next piece. This would greatly enhance the playability of MP3 music.

Back key quirk
       While the Back key works in the browser pretty much as a back key normally works on a browser, it has an annoying quirk. Rather than just stepping back to the last URL, it steps back to the last screen. So if you have adjusted the screen gain from (say) fit-to-width to 150%, which you have to do all the time, the Back button takes you not to the last URL, but to the same screen at fit-to-width. This means when you open the next URL it again starts at fit-to-width and the cycle repeats. Gees...

Gain continually resets to fit-to-screen
       The default screen gain setting on the browser is fit-to-screen. This means the vast majority of sites are unreadable on the small kindle screen (Drudge is the exception) when they first come up and need an Aa gain change. Can't the starting gain be remembered? (It is possible it is, but is cancelled by the weird action of the Back button I describe above.)

Browser continually reloads
       I don't know how much RAM kindle has, but one of the things that makes browsing slow on the kindle is that when you step back through pages, they all must be reloaded, which for news sources can easily be 30 sec/page. On a computer browser the last few pages are stored in temp memory and come up without delay.

Wrong size magnifier box
        In pdf documents a box will appear on screen with an embedded plus sign to indicate what fraction of the screen will be shown if Aa magnify is chosen. But I find this magnify box sometimes inappropriately showw up in the browser. For example, entering my homepage there it is.  The problem is that box size is smaller than even the highest gain. It is just plain the wrong size.

        As a test I just started the browser at Drudge and the magnify box is not there. Hitting Aa in Drudge shows that it starts (for whatever reason) with a gain of 'Actual Size' (what does this mean?). On my homepage, which thas the wrong magnify box, the gain starts in fit-to-width.

Pdf reader not integrated with browser
        Kindle has a built-ing pdf reader, but Amazon hasn't bothered to integrate it with the browser. In the browser when you try to open a pdf document it refuses. This is really stupid and shows how little effort Amazon has put into the browser.

Article mode not remembered
        Article mode is more than just a nice feature it is pretty much required to read online article in the browser. So why is not remembered? I select one of my own essays in the browser and go into article mode, which makes it nicely readable. It contains external links. Clicking an external link, then immediately clicking Back to return to the original article you find yourself having to select article mode again! Crude as hell. No attempt to remember setting. Every (large) page the browser loads (and reloads) sets it to fit-to-width. It is stupidities like this that make the browser so frustrating to use.

Progress bar can't find beginning
        There is often progress bar at the bottom of the screen that indicates (I assume) where in a document you are. When I start the browser at my homepage (html text with embedded links), the progress bar on the first of perhaps 50+ pages is already at about 30%. As I step through the document it increments (probably correctly) just a tiny bit each page, but it doesn't know where the first page is!

        The beginning of my homepage has a border around the title. Is this simple little html tag confusing the kindle start code?
Article mode can't find the beginning
        Perhaps related is the weird action of article mode. Upon entering my homepage if I select article mode, I get the nice readable article mode formatting, but it doesn't start at the beginning but about one and a third pages into the document. Like the progress bar article mode doesn't know where the beginning is either. Ever weirder when I try to back up in article mode, it won't.

Starting Browser
        There are two ways to start the browser. The obvious way, the way that virtually every reference recommends, is via menus: Menu, Experimental, launch browser. Not only is this a lot of keystrokes (7), but it take you to the URL you were last at, not to a homepage. The lack of a browser homepage is a huge lack on the kindle.

        A big problem with going to the last URL is that you are likely to be trapped there with no easy way out. This is very frustating. Remember there no homepage button to hit. For example, I often exit the browser when I get frustrated by the NYT instead of taking me to a news article I have selected brings up its password page. When I restart the browser via the menu (maybe days later), where does it start?  Yup, it starts where I exited, right where I don't want to be, at the frustrating password screen of the NYT.  Argg!
        With no back button, no homepage button, no keyboard shortcut to Google, what do you do then. (The Back key does work in the browser, pretty much as it does on any browser, but on entry hitting Back just exits the browser.) The only way out I know is to type a URL. This is bad... Clearly some browser activated keyboard commands are needed here.

Make yourself a browser homepage
       There is, however, a better, and largely unknown way, to start the browser. Links to the web in Html documents on the kindle remain active. This means you can essentially make yourself a browser homepage with with an Html editor. This is what I have done. How? Easy, an Html document (even if only a few lines) shows up like any book on your Home screen. You could also make several link documents and group them into a collection called (say) 'Browser Links'.

        When you click on an active link in an html homepage 'book', the browser automatically opens and takes you to this link. As far as I can see this is largely unknown, or greatly unappreciated, feature of the kindle. When you hit 'Back' you are returned to your custom html 'homepage', so you can easily go from link to link.

        To make an html homepage you need an html editor to generated the URL links. The best way I have found to load the html documents onto kindle is to use Calibre (it preserves the figures). You can also just copy the .htm file to kindle via USB, and then change the file type from .htm to .txt. (I know this is weird, but I verified this works on kindle 3.)  There are many html editors. I use the free html editor in Netscape (Composer). Netscape is no longer supported, but its nearly identical successor is available free in the SeaMonkey browser (Window, Composer).

Desperately needed
        The browser (and many kindle screens) desperately needs reliable keyboard commands to move the screen right/left and up/down. Moving the screen by scrolling the cursor to the edge is horrible, slow both crude.  This is now half ass implemented with Alt H/J that sometimes works (and sometimes doesn't), and there is nothing for up/down.

        The browser also desperately needs a reload (F5 like) keyboard command. There is a reload icon (top right) but having to scroll up to reload icon makes it near useless.

Aa screen flaws
Landscape icon location
       I think there are multiple problems with the portrait/landscape rotation ions. I am a right hander and for me the most natural orientation for landscape is with the buttons on the right. Its icon should be adjacent to the default portrait icon, but it's not, it is all the way at the end. It's in the wrong place!

        I have never seen anyone comment on the Aa screen layout, but to me it is gross obvious flaws. It looks like it was laid out by an idiot, or maybe a graphic artist who balanced the screen with the long rows top and bottom. But hey Amazon, the screen should be laid out to make it easy to use and to minimize key strokes, not to look pretty!

Landscape/portrait row location
       And look where the portrait/landscape icons are located, way down at the bottom of the Aa screen. The whole line of rotate icons is in the wrong place! I would guess (maybe Amazon has data, but I doubt it) the two most commonly used commands on the Aa screen would be text size and landscape/portrait. In fact I would think the most used would be landscape/portrait which might get used many times in a document to look at figures. So what is it doing at the bottom of the Aa screen?

8 keystrokes to rotate screen
       To rotate the screen each time you need to scroll through Typeface, Line spacing, Words per line, Text to speech! Give me a break. These commands are likely to be selected at most (I have never used some of them) once per document. On the Aa screen it takes 8 pushes of the five way switch to rotate the screen, whereas it should take 1!  It's 8 more keystrokes to rotate back, so if you just want to rotate to look at a graph (it's bigger in landscape), then this takes 16 keystrokes! Good grief.

Landscape rotation icons are reversed
        I am right handed and usually hold the kindle in my right hand. I can only speak to my preference, but to me the natural, obvious orientation for landscape on kindle is with the buttons to the right. This somehow just seems right to me, perhaps because it makes the kindle easier to hold in your right hand. Thus I think the favored rotation to landscape on the Aa screen should be counterclockwise, but Amazon has it the other way. While both rotations are possible, if you look at the Aa screen you can see that rotation counterclockwise takes two more keystrokes than a rotation clockwise. The only advantage to a clockwise rotation (and it is an advantage) is that the page turn arrows continue to point in the right direction.

Screen rotation stupidity in Aa
       Another stupidity is how the cursor enters the portrait/landscape row in the Aa screen. In all orientations the cursor starts at one icon which you will never select, the icon for the orientation you are currently in. This does not look a bug, it looks like a programming choice. Just stupid. No effort to minimize keystrokes.

        The reason for scrolling down to the landscape/portrait row is obviously (obviously Amazon!) because you want to change the orientation, so why does the cursor go to one icon that does nothing? Does anyone at Amazon have a brain. Ok, in normal portrait orientation there are two landscape choices, but pick a default and start the cursor there!

Keyboard shortcuts
        There are now 9 useful keyboard shortcuts/commands needed to run kindle. Some are not just shortcuts they are the only way to do the task. For example, there is no menu for toggling background MP3 music on/off, just keyboard command 'Alt Space'. Apparently Amazon expects you to learn and remember these!

        These shortcuts should be printed on the back or at least a paper sticker should be included with the product that could be put on the back. I wrote them on the back with red indelible ink, but the back is so dark, they are barely readable.

MP3
                Alt space                    on/off toggle
                Alt F                           skip forward
Text-to-speech
               Shirt Sym                  speech on
                Back                           speech off
               Space bar                    pause
                Aa                                menu access for speech
Screen
                Alt G                           screen rewrite
                Alt H/J                       screen nudge right/left
                Alt Shift G                screen capture (to memory)
Memory
                Alt Z                          resample memory (after USB update)
Back key
        There is no 'Forward key' to complement the 'Back' key. This often makes moving back and forth between pages, like when reading a newspaper or magazine, slow and tedious.

        The back key does not consistently just go back a page. For example, I am reading a NYT feed (not pdf, obtained by Calibre), I navigate down a layer into business article and select one. When I finish and hit Back instead of returning one screen to the index of business articles, it returns me to opening NYT screen of the feed. (It's possible this weird action is related to the page, because the NYT then wants me to log in, which I can't figure out how to do.)

Where are all the needed keyboard commands?
        What is so frustrating about the lack of keyboard commands is I know from my programming experience how trivial it is to add them to the code if the functions are already programmed. Adding these commands would make zero difference to people who don't want to use them, but would greatly improve the kindle for those who do. With a nearly full querty keyboard (sans numbers) and three available prefixes (shift, Alt, and shift+Alt) a huge number of keyboard commands is possible. A listing of them could be printed on a sticker sized to fit the kindle back and just thrown in the box of a new kindle. This is a common practice with industrial electronics.

Setting up collections
        The tedium in setting up collections is a real weakness of kindle. Having to do this manually on the kindle one document at a time is ridiculous. There needs to be a way to automate this, allow it to be done in the computer. And my experience is if you get a 2nd kindle (see below) and set it up like the first you still need to do the process all over again! Copying the collections file over doesn't work! What !!

        Amazon likes to say you can put 3,500 books on the kindle. What they don't mention is that stepping through and organizing into collections thousands of book is near impossible. Organizing the hundred or so items I first put on my kindle was time consuming, and now with all my MP3 music I have 35 pages (10 items/page) to be collected (one at a time) into collections. There is no way (well there is one techie program out there in cyberland) to generate collections on your computer, where files are easily moved and copied. On a kindle each new files must be stepped though and toggled into a collection.

        But its much worse than this, because in what I consider a major programming goof up when you start a new collection all the other collection items are pulled out of their collections and displayed too. If you had thousands of books on your kindle and were making a new collection of some new books, you would need to step through thousands of books (about ten at a time!!) looking for the new ones to scoop up. This is ridiculous. The point of collections is to gather up and effectively hide files. What you are making a new collection of new items you want the default to have your existing files in collections to remain there hidden away.

        There might possibly be a way around this, but as yet I haven't found it. Found it...  The procedure is first select 'Collections'. This keeps all the items already collected hidden, then on the Home page right click on an item, then 'Add to Collections'.

        I now have 350 items on my kindle (most of it MP3 music). When I scroll up and select sort option 'author', title, or 'most recent first' my Home page has 35 pages. Given the kindle slow stepping through pages, this makes these 3 of 4 choices very slow to navigate. And I have just 1/10th the 3,500 items Amazon likes to talk about. If I had 3,500 books, these sorting options would give 350 Home pages, making them totally usable. The only usable choice with a large number of items is 'Collections'. Amazon needs to do something about the limitations of its sort options.

Collection procedure that works best
        I just entered 94 files (Mozart -- piano) using this procedure, five keystrokes/entry. Start in 'Collection' sort, then only the files not in collections display. I found it does not matter in which order the files are added, when the collection is opened my MP3 files (with no tags) display in alphabetical order of filename (which is what I want).

Keystrokes ---- Right click file, double click (defaults are 'Add to collection' and  my 'Mozart - piano' directory). The entry is now added to the collection. Double click 'Back' returns you to Home screen, but the file you just collected will be gone, so scroll down to the next file to collect and repeat. (This sequence goes fast, you don't need to wait for the screen to update, so it's only 2-3 sec to add a file to the (default) collection.)
Trick to speed file entry into collections --- The above procedure for adding files to a collection is only fast if the collection you want to add the file to is the default (or first) collection. Unfortunately kindle does not set the last collection accessed first (see below for why this is stupid), but there is a work around. The collection name most recently created comes up first, so don't, as I did, create all your collection names first. Enter a new collection name and then fill it. When I had a lot of files to enter, I found it quicker to delete the collection name, and then reenter it. This sets it first. (I tried just renaming it, but this did not set it first.)

Last collection accessed should be first one offered ---- Procedure above was for adding a lot of files to one collection. When I tried to sort a couple hundred Mozart concerto files into many different collections (a sort by instrument), I found it did not work well, a whole bunch of extra keystrokes were required for each file.

        What should happen is that the first collection offered should be the last collection accessed. This would allow (as above) a double click after right clicking the file. This is common sense. This is how the ordering is done on the Home page, but the interface is not consistent. Here I found after clicking 'Add to collection', I had to repeatedly scroll down to reselect the same collection. A ton of wasted keystrokes. No optimization on what is one of the kludgier aspects of the kindle. Do the Amazon people ever use this interface?
Why are my MP3s suddenly out of order?
         I started to put my 94 Mozart piano concerto movements into a collection, and (yikes) I find them all out of order on my Home screen, but they were in order. What happened?  No idea. What is really weird is that while my Home page items are now not in order, all my collections remain in alphabetical order. The kindle sort and ordering options appear to be unstable and far too limited. Very frustrating.

        (Update) Adding more MP3 files --- I find a lot of them are displaying by what I think are fragments of their filenames. I am nearly positive that all my MP3 files came from a directory where I had years ago stripped out all the tags. Tried resetting the kindle, but this didn't fix it. If anything some collections now seem to be empty! More frustations with the kindle OS.

Deleted item bug!
        I am really pissed about this one. My collection of Mozart piano pieces did not start off clean, so I decided to clean out the collection and start again. When I right clicked, one option was 'Delete this file". I thought this option probably would delete the item from the collection (not from memory), and if it did mean delete from memory I would be given the usual confirmation box (are you sure). What I find is that the the file deleted (apparently) from memory, and I was never asked for a confirmation. This is a horrible bug. Deletions from memory should never be allowed without a confirmation box.  Sure enough when I hooked up my computer to look at the kindle memory, three files were gone, when all I was trying to do was remove them from a collection.

 Delete or Remove
      I looked at delete options some more and found them inconsistent, another weakness in the user interface. Here is the problem. If an item is not in a collection and you left click it, the only option is do delete the file. But left click an item in collection and the only option is to remove it from the collection. Perhaps this is defensible but I don't think so. Not only is not consistent, but the 'remove from the collection' is hidden away on its own screen, where normally delete file would be. This is why I did not find it.
Setting up a 2nd kindle
        After getting my first kindle set up, I bought a 2nd kindle. The 2nd is a backup that I will probably keep in the car. I set about setting up the 2nd kindle like the first. Amazon makes a big point about synchronization, so I (perhaps unrealistically) was expecting the synchronization function would somehow read the contents of my first kindle and automatically transfer it to the 2nd. This is what I had been telling people about the kindle. I did as instructed by Amazon and not one document transferred! Zero.
Non-synchronization of 2nd kindle
        Still don't really know what synchronization does. I suspect it only covers books downloaded from Amazon, and all we are talking about is Amazon downloading a copy to the kindle plus a link to the last page read.  (While I have over 300 items on my kindle, not one of them is an e-book I bought at Amazon.)
       Since sync was useless, I plugged in both kindles to my computer and manually copied over each subdirectory. I have a few dozen subdirectories, so this took a while (like an hour). When all my documents, something like 300, were copied over, I powered up both kindles and verified both had the same documents. However while Home on my original kindle Home has only 3 pages since everything is gathered in collections, the 2nd kindle Home had 28 pages!

Coup-de-grace --- collections.json
       Now came the coup-de-grace (or so I thought). I had discovered in my research that collections were held in a single file called 'collections.json' in the Systems directory. This information seemed solid, because someone had taken it apart, saying it contained (full) paths to the files. And they had confirmed this by writing a new 'collections.json' on their computer, which they then copied over to the kindle.

        Unfortunately his method of doing collections on your computer was just too computer techy (and probably risky) for a non-programmer like me.
Trick to avoid manually setting up collections
        But I thought I had a trick, a way to avoid manually setting up collections. Just make the directories of the two kindles the same, then file paths are all the same, right?

        Since my two kindles had the same directory structure and files, I was sure that copying over 'collections.json' was all I had to do to gather my 300 items in my 2nd kindle into collections.  Well, it didn't work!!  No collections. Amazon why does this not work? Has Amazon done something stupid like encoding the kindle Serial Number into the file?

        Now I will admit the directory structures are not completely identical. I have a couple of hidden directories, which kindle does not use, on the first kindle that I did not copy over, but all the kindle directories with kindle documents ('documents', 'music', etc) have been copied over.
Need a restart
       Found the reference below for the structure of kindle system file 'collections.json'. It said that kindle needs to be "restarted" for changes in collections.json to be recognized. I an not sure what restarted means, so I held the on/off swich for 30 sec or so to reset the kindle. I think I got one directory (one with 0 members), but still 28 Home pages. Curiously I now see that progress dots have been carried over (somehow) from the first kindle to the 2nd kindle, but I have little interest in this.

        http://bugs.calibre-ebook.com/ticket/5847

Don't Sync
       Following links in above I find poster complaining that changes to  'collections.json' do nothing. One poster also said if you do a 'Sync' (kindle menu item), then the file is changed, but that doesn't seem right to me, as I can do a Sync on my first kindle and it does not affect its collections. But maybe Sync does clear the file, because when I rechecked 'collections.json' it was only 1k on 2nd kindle vs 16k on first kindle. Ok, progress they are not the same.

Transferring collections between kindles
       Finding 'collections.json' file for some reason in kindle #2 changed, I repeated the process: I copied over 'collections.json' from kindle #1 and rebooted the kindle #2. This time it worked, all my collections in kindle #1 appeared on kindle #2 with 'Home' shrinking from 28 pages to 3 pages! Here is the step by step procedure I used:

                a) Connect kindle #1 and kindle #2 to USB ports on same computer
                b) Copy directories with document and music files from kindle #1 to kindle #2
                c) Copy 'collections.json' file from 'System' directory of kindle #1
                                  to 'System' directory of kindle #2
                d) Disconnect kindle #2 from USB
                e) Do not Sync kindle #2
                f) Hold power switch for 15-20 sec to reboot the kindle #2

        The reboot is necessary. Collections do not appear until after the reboot, and even then it took 5-10 seconds for them to come up as the screen rewrote several times. As I guessed, the directory structures of the two kindles do not need to be absolutely identical for the collections to transfer. I did not copy hidden (remote backup) directories from kindle #1 to kindle #2, but the collections transferred OK.

Setting up slave kindle (update, 4/7/11)
         After a lot of work getting my master kindle set up the way I wanted, I used the above procedure to transfer over all the files and collections from the master kindle to the slave kindle. It worked slick. Just three copy commands, about 30 min, a kindle reset, and all my 2.8 Gbyte (500 or so files) music and document files copied over nicely. and on the Home screen they are neatly collected into 23 collections.

        To keep the kindle organized I use the same format for collections and subdirectories. I store the files by subdirectory, and later collect up the contents of each subdirectory into a collection, so for example, all the files in the 'Mozart -- horn' collection are stored in 'mozart - horn' audible subdirectory. In addition to copying over the 'audible' and 'document' subdirectories to transfer documents, the (23k) file shown in the System directory named 'collections.json' is copied over, because it contains the collection information.

Music file organization
        I keep most of my MP3 music files in the 'audible' directory, where they are all accessible. Periodically I will move a subdirectory from 'audible' to 'music' to allow all its files to be automatically played (in sequence). The collection name of the moved files remains, but shows '0' files, which indicates to me this collection is now set to run as background music (Alt space). When the subdirectory is returned to 'audible', the collection is automatically restored. Since collections are not adversely affected by these subdirectory transfers, my master and slave kindles can be set up to play different music. Shuffling subdirectories back and forth between 'audible' and 'music' directories is easy and very fast (if you have a computer and cable handy). No files appear to be copied, the paste following the cut is virtually instantaneous.

My kindle files
       Here's an Explorer screen capture of my organized kindle files.


 Directory named spfiles... I added for offsite backup of personal files.
It does not affect collections or other kindle functions.

SyncToy 2.1
       I recently obtained a free utility from Microsoft called 'SyncToy 2.1', which automates the task of keeping two directories aligned. Haven't tried it with the kindle yet, but it might be useful to keep multiple kindles aligned.

Pictures display mode
        Kindle can display pictures & graphics. I am not sure what the status of the picture function is. It does work (with some problems), but as far as I know Amazon documentation does not mention it. It seems to be either something Amazon is working on or has abandoned.

        I read somewhere that you can add this function to kindle by simply adding a directory called 'pictures', and there you put your pictures. In fact this works on my kindle 3 (now at software revision 3.1). And it works like the other directories in that you can use subdirectories, and you can collect up your pictures in collections.

        I have already found the picture mode useful. I gave a talk at a local high school and was able to take along the graphics for the talk with me by putting them in a picture collection. The same graphics were in an html essay also on the kindle, but in the picture mode the graphics displayed bigger and more readable.

        However, my experience using this mode is that it is flaky (unstable). I could always get a graphic (modest size jpg and png) to display, but it would sometimes take several page steps forward and back. They would sometimes half erase, sometimes they come up blank. For example, if I powered down the kindle with a graphic displayed, the screen would be blank when I powered up again. But page stepping forward and then back would restore it. I see the same flakiness on digital camera pictures, which tend to be much larger jpg images. While 'pictures' is usable, it's also really buggy,  and it badly needs some work by Amazon programers. Also there needs to be guidance on what pictures sizes and pictures file types are supported.

        So Amazon is this mode supported or not? I want it supported. Fix the picture bugs!

Updating the operating system
        In the first week I had my kindle Amazon updated the operating system (to 3.1). They don't ask your permission, if you are within WiFi range (maybe it needs to be your home WiFi), they just do it. I got an email from Amazon saying this would be happening soon, so I checked my version #. When I looked an hour or so later, I saw my version had incremented. Apparently the only way to stop this is to turn off WiFi.

More kindle weirdnesses
        I have a paper by Tesla in a collection of science books. But when I say list by collections it is listed outside the collection. I confirm it is in the collection. So I right click on it, add to collection, kindle suggests Science books (how, from an author tag?), I say yes. I then find the science books collecton has an extra document with two identical copies of the same document. Gees! This might have been triggered by my earlier renaming the sub directory 'tesla' to 'Tesla'. Are directories in kindle case sensitive. Who knows, Amazon doesn't tell you, but probably they are. This would explain why only the science book to appear outside of its collection was the Tesla book. I connected USB to see how the 2nd Faraday copy was entered, but of course, there is only one Faraday file, and it is duplicated in the collections file, which is encoded.

Don't rename directories
       I deleted both tesla files from collections and then added it back, but is doesn't disappear from the Home page. Renumbering the subdirectory has messed up collections. I am going to have to physically remove the files from the kindle, clean out collections and reform them.

Turns off every 10 min!
        One kindle reviewer raged that the implementation of the screensaver feature was a disaster. He argues that if it doesn't take any (or any significant) power to hold a page on the screen, then why does the kindle turn off (and the screen saver pop up) if no key is pressed for 10 min.  10 min!! He says he reads book during commercials and has to push the power switch almost every time he picks it up. He argues why not 30 (or 60 min). I think he has a point. I agree with him I too find it annoying. It's another stupidity of the kindle user interface.

Beginning is page 10?
       When opening recently one of my technical essays (global warming physics) I right clicked and requested kindle start at the beginning. It opened on page 10! How can it not know where the beginning of a file is?

Dots to indicated file size and page read
        I had the kindle for several weeks before I really looked at the dots below the document name. I can see now they are supposed to indicate file length, and the last page read in the document, but they do so very poorly. My essays vary from a few pages to more than 100 pages, yet the number of dots varies only about a factor of two. Pretty useless indication of length.

        The indication of page read is slightly darkening and thickening of the dots. This is very hard to see, so hard I didn't even notice it for weeks. And when a document is hilited, a dark line goes through the dots making them totally unreadable!

Excessive delay in showing extended title
        If the document title (or filename) is longer than the screen, then after selecting it more text appears (in smaller font) below the main line. But like many other parameters of the user interface I don't think it is set up right, specifically the delay is too long. It is about 3 seconds. Too long... To scroll down the ten items on a page and look at the full line at 3 sec/line takes 30 seconds. It should either come up instantly or as fast as the screen will allow. When the page is turned, it takes about one seconds, so clearly at 3 seconds a delay has been programmed in. Amazon take out the delay!

Browser won't open a pdf file
        Browser refuses to download a pdf document. What? Kindle has a so-called native pdf reader, but the browser can't use it? Another kindle weirdness.

Background music
Alt F weirdness
        I shifted subdirectories in and out of 'music' directory. With the bassoon and aria subdirectories under 'music' I stepped through a few pieces using Alt F. I got both bassoon and arias, and then Alt F ceased to work (stopped on an aria). When that piece ended, the music stopped and Alt space did not restart it. The menu option didn't restart it either. What, background music doesn't wrap around? Yup it looks like it. I took out the aria subdirectory, the bassoon pieces started playing. I again used Alt F to advance through the bassoon pieces and again it stopped advancing, and when that piece reached its end the music stopped.

Wrap around bug
        The wrap around bug may be more subtle. After advancing through the bassoon pieces to the end where Alt F stopped working. I then let the piece play through, and as with the aria the music shut off. It did not automatically wrap around.

        However, when I played with Alt F after the the music music stopped, I was able to initiate a wrap around and the music started again. I did it again and found that I could also begin a wrap around with Alt space. So the bug seems to be in the code for Alt F, it is not able to jump to the first piece, so you are forced to let the last piece play through to get a wrap around! Good grief... (my conclusion below still stands)

        No (Alt F) wrap around is another stupidity in the kindle user interface. (Do they ever test this thing?)

In what order to songs play?
       I expected to see the last piece played to have the last file date. Nope, it was in the middle. How really does the kindle order pieces in the MP3 music directory. It is not by file date. It says they play in the order entered. I copied in a whole directory (from Music2), so what order are they entered in? Can you change the play order by deleting a directory, reorder it in your computer and reloading it?

First entry into 'music' directory play first
        I ran several tests mixing copied and moved (cut/pasted) files and directories into the 'music' directory from my hidden 'music2' directory and from the 'audible' directory. In each case the file/subdirectory moved or copied first played first. This confirms what Amazon says.
Moving subdirectories between 'audible' and 'music'
        I tried moving directories back and forth between the 'audible' directory, where files can be played on demand, and 'music' directory, where files will auto play in sequence. The files when in the 'audible' directory had been put into a collection. This was a success. I was afraid it would mess up the collections, but they were well behaved. This is a good way to shift music files around.
What happens is this
        My Scott Joplin collection was assembled from files in the Scott Joplin subdirectory in 'audible' directory. It normally lists on Home screen as 'Scott Joplin (audio) (59)'. When I move the Scott Joplin subdirectory to the 'music' file, so it will auto play in background, all that happens is that the Home screen entry changes to 'Scott Joplin (audio) (0)'. The collection is still there and even though when it was made it had 59 entries, it now correctly reports 0 entries. When I move the subdirectory back to 'audible' the collection is restored and correctly reports 59 entries. Neat.
Best way to organize MP3 music files
       With collections in 'audible' so well behaved I now see there is little need for my (hidden) 'music2' directory. The most flexible way to handle music MP3 files and to conserve memory is keep most music files in 'audible', organized by subdirectories, with each subdirectory's files made into a collection. To auto-play through a subdirectory cut and paste it to the 'music' directory. It's collection on Home will now show '0' files. In this way a small (rotating) part of the music collection in memory can be set to auto-play while most of the music collection remains accessible.

        Something Amazon doesn't tell you is that background music will also play while you browse the web.

Playing music and draining the battery while off!
       Playing background music continues to play when you turn off the kindle (slide the power switch). All this does is prevent you from turning it off. Yup, you have to turn it on to turn off! Maybe this only puts the kindle to sleep, but if there is a way to turn off the kindle I don't know what it is. Maybe it's holding the slide switch, but if it is I don't want to risk this, because holding for a long time resets the kindle.

        Even weirder, I was listening to some music for a few minutes and when I went to turn it off (Alt space) it didn't work, because the kindle had turned itself off leaving the music still playing. Is this a feature? I think it is totally bizarre.

Kindle case & kindle reading lights
        Look at the kindle 3 case and you will see two slots on the left side. They are each about x10 the size of the microphone hole on the bottom. What are these side holes for? They are not mentioned in the Amazon data sheet. I suppose it is possible they are a way to open the case, which has no obvious way in, but two on the same side seems odd.

        On a forum search I found the answer. They are used for the kindle cover. One of them (bottom?) provides power for the cover LED. Yup, I checked the $59 Amazon kindle leather cover (One user said, 'Double the weight and triple the thickness of your kindle!) and user photos show the cover plugs into the left side slots.

        An interesting alternative for a kindle reading light is the Mighty Bright ($15). This curve neck LED lamp is powered by three AAA batteries and clips on the kindle. One reviewer reports he used it nearly every night and batteries lasted him about four months! It has two 'super' LEDs behind a lens, and you can switch on one or two. Some complain it that's its clips are too large for the kindle 3, that you end up clipping to the screen, but when I press on the screen nothing happens, so I am not sure this is a big deal. It weighs 3 oz, but this will be sans batteries, so with batteries it probably about doubles the weight of the kindle.

Complaints in various Amazon reviews

Navigation
        No easy way to navigate within the book. Say you want to flip ahead 50 pages, or 150 locations. The absence of a touch slider hurts. You have to go through the menu and use "go to".

Subdirectories
        No sub-foldering/sub-collections

 My comment
        You can in fact use subdirectories to keep you files neat. Subdirectory contents on the kindle are displayed (in a flat sense) with the directory contents. You move files into subdirectories after you put them into collections without messing up the collections. After collecting up my essays into technical and non-technical, I went back later and put them into subdirectories under the author name directory as 'technical essays' and 'non-technical essays', and (thank goodness) the collections were not affected.
Fonts
        No support for specific fonts. No matter what the font face of the original paper edition, the Kindle renders it in generic font faces like Seriff, Sans-Seriff, Courier etc... Which takes away from those things that gives books some of their uniqueness.

Creating collections
        You can't add books to collections when the Kindle is mounted as a USB drive. That means that you have to add books to collections using the Kindle interface, which is very slow and tedious. At least using tags in the eBooks as collections would have helped a lot.

Book locations
        Find the book(s) you're reading is not easy. The only way to see if you've started a book is to look at the progress dots in the list.

Links

Kindle store
        Link to top 100 paid and 100 free books, games, etc in Amazon's kindle store.

        http://www.amazon.com/gp/bestsellers/digital-text/ref=pd_dp_ts_kinc_1

Kindle games
        Took me a while to realize that Amazon sells games for the kindle ($1 to $4). Shows I haven't spent (hardly) any time in Amazon's 'kindle store'. I am surprised that there's quite a wide selection of games including chess. I suspect a slow playing game like chess makes a lot more sense on kindle that a faster game like solitaire.

        Reviews I read (mostly for solitaire) are a mixed bag. Lot of complaints that games lock up the kindle or that the game play is slow. I have seen other complaints that games with repeated screen updates lower battery life. Here's are link to solitaire and chess:

        http://www.amazon.com/EA-Solitaire/dp/B003P2PHI0/ref=pd_sim_kinc_2
http://www.amazon.com/Chess/dp/B004KACWZW/ref=sr_1_42?ie=UTF8&s=digital-text&qid=1302343682&sr=1-42

External kindle links
        Blog kindle -- daily news about kindle, ebooks, eink and other related topics. This has a lot of info including a section on tools and hacks (below):

         http://blogkindle.com/kindle-hacks-and-tools/

        One of the hacks described is custom screen saver, which unlike the procedure in appendix (below) works by downloading a .bin file into the operating system. Apparently people have cracked how kindle updates inself to link in code. However, there's no info on whether or not this hack works on kindle 3.
=========================================================================================

Appendix - Kindle

Headphones
        A good accessory for Kindle is a set of headphones. The kindle has a standard headphone plug that shuts off the speakers when headphones are plugged in. The plug is at the bottom, a location I find a little annoying if the kindle is hand held in portrait orientation, but rotating the kindle 90 degrees to landscape moves it out of the way.

        Doing a little research online I selected a 4 star rated Plantronics Audio 326 Stereo PC Headset. It has a long (7 ft) cord and a built-in volume control that allow the kindle volume control to be left at max. It also has a microphone (for PC telephone) that folds up neatly out of the way. A flexible package for $15.

Kindle gallery
        Kindle user pictures (from Amazon site)


Charlotte Bronte is one of 30 or so built-in graphic screensaver sketches (mostly authors)
(uploaded by Szekffy Tamas, Budapest, Hungary)


Left is clever AC charger that USB cable plugs into
(uploaded by A. Wiersch, Lantana, TX)


'Light as a Feather' (spec is 8.5 oz)
(uploaded by BlogKindle.com)

Info on kindle audio book format
        From a review site

        --The Audible format is a DRM (digital rights management) protected proprietary format only available from Audible. They protect their format diligently. From what I understood, they used to charge handsomely for the right to use it. I am not aware of any publicly available encoders that will create audible formatted files (for free or not). Since Amazon bought Audible I am not sure if they would even sell the right to anyone else anymore. (As best I know), kindle only supports Audible formatted files with full audio book functionality. MP3's can be played , but they are not treated the same way (no support for chapters etc)
Custom screensaver?
        Adding a 'screensaver' mode (info on how to do this you find online and below) does not work on kindle 3. Or at least the instructions I found did not work. The instructions seemed reasonable because basically it is the same as the picture mode, which does work. From reading the forums it seem clear that this procedure did at one time work, probably on kindle 1 or 2, but it doesn't work on kindle 3.

        The kindle defaults to a rotating set of author drawings (in same style) that I rather like. When taking the kindle out in public, a custom screensaver could be very useful as an identifier of your kindle. The kindle 3 (WiFi version) is hard to otherwise label as the case is so dark, even indelible pens are hard to read. I find blue works better than red or black. You can get your name to appear in the upper left corner of 'Home' screen using 'Device Name' under 'Settings'. However, it will not be visible when the kindle in use as books, MP3s and the browser all run full screen.

Does this work?
        Double-click the kindle "System" folder. Right-click on any blank space in the "System" folder and select "New," and "Folder." Name the new folder "screen_saver." Copy the image you want to use as your screensaver to the new Kindle directory. Remove the Kindle from your computer. Press the Kindle "Menu" item, and select "Settings." Press "Update Your Kindle." Wait for the update to download and install for the new screensaver to take effect.
        Tried it. It does not work on my kindle 3 (rev 3.1). No change to the screen saver. Also on my kindle there is no entry under Settings to "Update Your Kindle." I tried Alt Z, which is the closest.
        A search of 'screensaver' in the kindle reviews does not find above. What I find is people complaining the screensaver cannot be changed, or changed "without 3rd party hacks". Is above a 3rd party hack?

Does this work? (old from 2008)
No. Basically same as above, thus adds a way of exporting files to screen_savers directory, which also doesn't work (Maybe this did work in kindle 1)

1. Attach the Kindle to a computer using the USB cord.
2. Using Windows Explorer (or whatever you use to see individual files/folders) , you should see a new drive called Kindle under My Computer. Go to that drive. (Or if you have an SD card in your Kindle, you can go to the SD drive.)
3. Create a new folder called “pictures” and a subfolder called “screensavers” under it. Make sure both folder names are all lowercase.
4. Copy your image files into the screensavers folder. Your pictures should be 600×800 pixels and black & white. I’ve only used .jpg files. [[Note: I've used .png files as well]]
5. After copying is complete & it is safe, remove the Kindle from the USB connection.
6. Go to your Home menu and press alt-z. This will create a new book called “screensavers” . Open it. You’ll see each of your pictures. You can advance through them with the prev. page and next page buttons. [[Note: The new book will appear at the END of your book list]]
7. While viewing your pictures, look at the bottom of the Kindle screen. If you see your battery indicator & Menu prompt, press alt-F to go into Full Screen mode.
8. On each photo, press alt-shift-0 (i.e., alt-shift-zero) . After a brief delay, you’ll get a message that your picture has been exported as screensaver. Click Close on the message.
9. Navigate to each of the pictures you want to use and repeat the above step.
10. When you’ve got all your pictures loaded, test them by going into & out of sleep mode. Alt-aA (i.e., alt-font size button) puts it to sleep & wakes it up again. Each time it sleeps, it should use a different image. If you see the same image all the time, relook at Step 3.

If you want to get rid of your custom screen savers, follow these steps:

1. Attach the Kindle to a computer using the USB cord.
2. Using Windows Explorer (or whatever you use to see individual files/folders) , go to your Kindle drive under My Computer.
3. If you see a folder called system, skip this step. If you don’t see the system folder, click on the Tools menu & then Folder Options. Go to the View tab, and look at the Advanced Settings. Under Hidden Files and Folders, select Show Hidden Files and Folders. Click Apply, then OK. You should now see a system folder.
4. Under the system folder, you’ll see a screen_saver folder. Delete all the files that are in that folder.
5. After you disconnect from the USB, you may see your last custom screensaver one more time, but after that it will revert back to the pre-loaded Kindle screensaver images.

Kindle microphone
        The fold out sheets that come with a new kindle 3 identify a tiny hole to the right of the headphone jack as 'Microphone'. There is also a setting called 'Voice Guide' that presumably uses the microphone. Voice Guide does now work, though incredibly Amazon lets you turn it on and does not tell you it is not supported!

        Reading the tea leaves it more likely than not than not that microphone is on the kindle PC board awaiting an OS upgrade to become active, but it's also possible that the microphone location on the PC board is empty. Opening the kindle case could determine if it's there, because it would be mounted right behind the case 'microphone' hole.

Oddball uses of kindle
        By accident my kindle solved an usual problem. Why was my cable out?

        On day without warning all my browser links were dead. I assumed that Comcast cable had gone down (which it almost never does), but noted all my TV channels were OK, so it seemed strange that only the channel used by the cable modem would be down. As I was waiting for the cable to come back, I picked up my kindle and just playing around used as a WiFi detector, to display local WiFi networks. And son of a gun, while my neighbors WiFi signals were their usual strength, my home WiFi network was gone, not listed by the kindle. The cable wasn't out, my router was! I rebooted my router and all was well. So another use for kindle is to check your WiFi network.
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Kindle Problem Summary

annoyingly shuts off every 10 minutes!
setting up collections is far too hard (each document must be collected manually on kindle)
        need to repeatedly (& needlessly) reselect the same collection
Aa layout screen is poor (far too many keystrokes needed for rotating screen)
        Screen rotation stupidity in Aa -- Landscape icon location, 8 keystrokes to rotate screen,
         Landscape rotation icons are reversed

Slow scrolling
Multiple page turns not clean
30 sec jump weirdness (audible/MP3 screen)
Back key quirk
Progress bar can't find beginning
Picture display is a mess
Delete item inconsistency
Excessive delay in showing extended title
Dots to indicated file size and page read are really tiny
no support for setting up a 2nd kindle (as a clone)

support for html documents is poor (Amazon conversion for html very limited and flaky)
Amazon file conversion makes a mess of filenames (changed and hugely lengthened)
suggest a beep when a file is received via WiFi
pdf conversion is hit or miss (try both Amazon and Calibre)

pdf reader is poor
     no table of contents (no internal links)
     no adjustable gain
     no easy way to shift the screen on the page
     search has multiple flaws
browser has no homepage, no reload, no easy way to move screen (up/dn, rt/lt)
      annoying every page starts fit-to-screen (too small to read), no full screen

Alt F (MP3 advance) does not wrap
MP3 player features are deliberately crippled (no step back, no mention that MP3 can be played like audio books)
Kindle does not power down cleanly (MP3s play with device sleeping)

Browser
    Gain continually resets to fit-to-screen
     Browser continually reloads
     Wrong size magnifier box
     Browser won't open a pdf file
     Pdf reader not integrated with browser
     Article mode not remembered
     Article mode can't find the beginning
Browser trap --- No back button, no homepage button, no reload, no keyboard shortcut to Google

Playing music and draining the battery while off!
Alt F weirdness -- does not wrap

Trick to avoid manually setting up collections
==========================================================================================================

Blackberry Playbook Tablet
created: Feb 2012

        A year after buying my Kindle I bought my 2nd tablet, the 32 Gbyte Blackberry Playbook ($250). Playbook, unlike Kindle, is a real computer that really works well for browsing online, yet is only 7" and 15 oz. Includes two cameras, two speakers, two microphones, GPS, Bluetooth, 1024 x 600 color touch screen, does 1080p video, multiplexes and plays Flash video (YouTube). The latest Ipad does not do multiplexing or play Flash and its video, camera, and sound are all inferior to Playbook.

        Feb 23. 2012   --- I ordered a Blackberry Playbook (32 GB), $250, my first tablet computer
        Feb 29, 2012   --- I love this thing!

        I have had the Playbook four months now, and it is not a toy. It's is a 'real' computer, very practical to read the New York Times online, do email. Also works well as photo, music and video player. I have learned to like the email function a lot. It beeps when an email arrives and flashed a red light when there are unread emails. It shows my two email accounts in one list. From the beep function I can see that when I send an email from my desktop it arrives at the Playbook in just a few seconds. (A message on the email inbox page "Unable to connect to server..." will display after a system restart. To reconnect Playbook to your email accounts go to Settings/Accounts and (re)save (with no changes) the account properties of each unconnected email account.)

500,000 sold in first year (3/30/12)
        I bought my Playbook in Feb 2011, just after OS 2.0 was released. RIM in Mar 2012 says it has sold 500,000 Playbooks (since its introduction in April 2011). RIM at the same time announced its 5th quarterly loss. 500,000 sold means Playbook revenue on the order of 100 to 125 million vs 4.2 billion total company revenue, barely 3%.

Amazon review (March 2012)
        Here is my Amazon review, which I reved many times. I included a list of bugs at the end, because manuf often read reviews.

I love this thing!
------- (update) ------
Tip to improve WiFi reception

The 2.4 Ghz WiFi antenna is in the upper left hand corner in landscape orientation. Wrapping your hand around this corner to hold Playbook, as I like to do, reduces WiFi signal strength a lot (a bar or two, factor of x100 or 20 dbm), which can be the difference between getting online or not when traveling. A simple trick to get good WiFi reception while still holding Playbook with the left hand is just flip the Playbook over so the 'Blackberry' logo is on top. This puts the most commonly used 2.4 Ghz WiFi antenna on the right.

Check out the 'SANOXY Bluethooth Keyboard for iPad'. It's a very inexpensive bluetooth keyboard ($16) that works fine with Playbook.
-----------------------
 7" screen size is fine, sharp as a tack (viewed with reading lens of bifocals), bright and colorful, sound good, screen responsive to touch. Swipes easy to learn.

On browser homepage
 On my desktop browsers I have all my frequently visited links in a single custom .html file that I set as my homepage. To me a custom .html homepage is essential, it makes bouncing around the web fast and easy. I first tried copying my custom .html file into the 'Document' folder, but found it was not visible under 'Document' icon, but later going backdoor I got it installed as the browser homepage. Here's the procedure:

Type into browser: file:///accounts/1000/shared
(note 3 ///)

This brings up a simple file manager that allows you to see what files are in memory and even to launch them. In the Document folder was my custom html homepage file, which I had earlier copied over via USB. Tapping the filename loaded it into the browser, and holding my finger on it allowed me to copy the filename (via the copy box). Finally going into the browser settings I was able to paste the filename into the homepage window. Now every time I start the browser up comes my custom homepage.

Another neat trick is to have alternate start links for the browser on your home screen. This is done by clicking the star+ button and selecting add to home screen. For example I have a icon that will start the browser at the New York Times and another for local radar.

On media files
MP3 files can simply be copied over and will play. Video files are more difficult. I have a library of captured .flv files and captured TV shows in .ts format, some of which I would like to put on the Playbook to view when out of WiFi range. However, neither of these file formats is supported directly on the Playbook. In principle there are two options: copy over the file and use an app that does on the fly conversion, or two, preconvert the file to a supported format (like .avi or .mp4). I experimented with both.

 There are several apps that claim to allow you to play .flv files on Playbook. I bought one for $0.99 and while it played .flv files, it was not clean (position slider did not work). I tried a couple of converter programs, which you run on your desktop before downloading. The best (by far) was Freemake Video Converter, not only is it free, but it's simple to use and will convert a batch of files in one shot. I found it shrank the file size of .ts files, which are initially quite large, by roughly x3 and expanded the size of .flv files, which are initially small, by roughly x2.

Before converting a lot of files I did several tests comparing file formats and resolution. Freemake Video Converter makes it easy to reduce file size by lowering resolution. Tests with a sharp HD video showed no difference that I could see between 1080p and 720p on this small screen, so I decided to go with 720p. This resolution reduces .ts file size by a factor of 4. Reducing quality to TV level, still very watchable, reduces .ts file size by a factor of six.

Quick tests of various formats (avi, mp4, wmv) showed no significant difference in quality or file size and all seemed to play fine on Playbook, so I choose avi and began converting. This turned out to be a mistake. Not one of the first three converted TV shows (1 hr) would play correctly on Playbook. One refused to open and other two gave an error when the slider was moved, though all played correctly on my desktop. The only reason I can come up with is that Playbook has a problem with long files in avi format. My quick tests had been with short files. I then noticed that it says in the Blackberry document, 'Supported Media Types on Blackberry Tablets', avi. wmv, and mp4 are "supported", but the "recommended video format for local playback" is mp4. So I reconverted the same three TV shows to mp4, also lowering the resolution one step to 720p, and now all played fine on Playbook. So my recommendation is stick with mp4, which is the format Playbook uses for its own videos, and reduce resolution to 720p (1280 x 720).

WiFi file transfer
 A neat trick to easily transfer files to Playbook from your computer over WiFi (no cable!) is to put a shortcut to Playbook on your Windows desktop. Set the 'target' of the shortcut to either the IP of your Playbook (found under About, Network) or the 'Tablet Network Name', which you can change (found under Storage and Sharing, Network properties) preceded by \\ (two backslashes). When you click on the shortcut, Explorer opens and Playbook will appear as a Network device. Click the Media folder and you now have access to all Playbook media folders. For this to work the Playbook 'WiFi Sharing' setting (in Storage and Sharing) needs to be ON. Transfer rate is a little slower than with a USB cable (about half), but perfectly usable.

Html files, pdf files and File manager
The Blackberry (so called) "File Manager" doesn't show file details, and critically (for some weird reason) it hides local html files, though it does show local pdf files and allows you to open them. Real file managers are available in App World. A pretty good basic file manager (free) is 'AIR Browser' and better is 'File Browser' (a buck).

'Air Browser' and 'File Browser' provide a way to work with local html files, they show them and will open them in the browser. Once open in the browser local html files work well, all the internal and external links work. I find it frustrating that Blackberry doesn't provide direct support for local html files, because I have a whole library of such files that I want to use on the Playbook.

Privacy
A useful app for file privacy is 'File Shield' (buck). It provides a simple way (without passwords!) to hide videos, photos, and documents. In the app directories and individual files can be toggled between private and public. When set to private, files and directories effectively disappear, visible neither to Blackberry applications nor file managers.

Bugs and weirdnesses
 I bought just after OS 2 release and my OS upgraded to 2.0 when my new tablet initialized. Here are the bugs and weirdnesses I have found in a week or so of use.

-- I initally wrote that my volume up/dn buttons had never worked and assumed it was a software bug because I read someone else reported volume buttons stopped working after an upgrade to OS 2.0. See comments where Ronald kindly set me straight.
-- Video application has a couple of drawbacks, one is no folders. In the pictures application if you organize picture files in subfolders, the opening screen shows only the subfolders. Not so with the video application. You can put videos in subfolders, but the video application still displays all your videos files on the opening screen. Primitive and inconsistent. Even more surprising the video application displays videos (with the formats it supports) regardless of the folder. Put a video in say, Voice folder, and it still shows up under Videos.
-- Document mode of the browser does not work right in portrait orientation (tested with New York Times articles)
-- a Hotmail text message in browser would not finger expand
-- Adobe's pdf reader come installed on the Playbook, but it is not well integrated with the browser. When a pdf link in the browser is clicked, instead of just opening the file your only option is to download the file.
-- 'Power Off' is a built-in Blackberry app with just three power buttons that are the same as under the battery icon. 'StandBy' in the app does not put the tablet to sleep (as it should), it does a ReStart (locking up your machine for two minutes)! You have to wonder just how much testing Blackberry does when a trivial app like this does not work right after a major OS upgrade.
-- As I discussed above, it appears the video player has a problem with long .avi files, though this format claims to be "supported".
-- With Blackberry emphasis on security it is surprising its OS does not directly provide support the hiding of files.
-- After a week of use the browser crashed (gray screen) requiring Playbook restart to fix it.
-- On my 2nd day with Playbook it crashed (it first refused to open files, then it hung with Shutting down splash screen displayed). There is a way to hardware reset the Playbook, equivalent to holding down the power button on Windows desktops, but I had to search the web to find it. It's hold down three of top four buttons (vol up, vol dn and power) for 10-15 sec (or until you see red led). This restored my Playbook to good health with no loss of data. I took off one star (5 => 4) for the volume buttons not working (whoops, see comments) and for a system crash in two days of use.

Web browser
Browser home page
          Setting up my .html homepage file as the homepage on Playbook (PB):
        I first tried copying the .html file into the 'Document' folder, but found it was not visible under 'Document' icon. However, it is visible with backdoor file access [file:///accounts/1000/shared] and tapping it loaded it into browser. Holding the link allowed me to copy it, and then was able to set up the file as homepage by pasting it into browser 'homepage' window.
Useful browser shortcuts
        It's possible to start the browser so it opens at URLs other than the homepage. Browse to the desired URL, then tap the star+ logo. This brings up a selector box, select the option of adding an icon to your home screen. I now have several homescreen icons that start the browser at different URLs, for example one opens at the New York Times another opens at local radar. During breakfast on a rainy day when I was about to go out: single swipe awakens the Playbook, single tap displays the radar.  Pretty neat and useful.

Browser navigation
       Swiping down and clicking the 'New Tab' will bring up the homepage. Sometimes this is the only way to return home (without exiting the browser).  Browser has a 'return' button in upper left of view screen, but it took me a while to realize how to exit a new page a link might dump me into. The trick is to the left of the 'new tab' are additional navigation commands. Thumbnails of open tabs (or windows) are top left and allow a jump back or a tab to be closed. The jump forward button displays here, but not in the normal view screen.

File management
Backdoor access to files
               Type into browser:                      file:///accounts/1000/shared                    (note 3 slashes)

See below for how this is the key to setting up a custom html file as the homepage for browser.

Subdirectories
        You can put subdirectories under the preset media folders. However, I found that this needs to be done with USB connection not WiFi.  This is probably because the USB connection even though it is through Explorer is somehow 'monitored or supervised' by Blackberry software, but the IP connection is Explorer only.

        I found pictures in the Picture viewer were automatically grouped by the underlying folders, but curiously this does not work in Video. Video accepts subdirectories, but displays their contents in a flat way. It shows only video with native support. Videos like .flv are only seen by opening the .flv player app.

File transfer via WiFi
        File transfer via USB cable is staightforward. Playbook mounts as drive Z and files can be copied, deleted etc in the normal way. But it's possible to do the same thing without a cable using WiFi. This is a nice feature that I gather is not widely available on other tablets.

        The Blackberry instructions for setting up WiFi transfer say type the Playbook IP in a desktop Run box (as   \\192.x.x.x) replacing number with IP reported by Playbook, but it didn't seem to work for me. (Well I now see that it does work, but no one said what to look for and at the time I didn't see it. What happens is Explorer opens and a Network device named 'Playbook-CBF3' appears.) Anyway there is an easier way.

Shortcut file access
        Make a shortcut for WiFi access to Playbook on desktop and put as its 'Target' the Playbook IP.  The Playbook IP is found under 'About, Network' (Also under 'WiF' IP hides at 'WiFi Information, Copy Logs).  File sharing also needs to be turned on. That's all there is to it. Clicking the shortcut now opens Explorer and Playbook (named only by its IP) shows up as a Network device. Two directories show, click 'Media' to get to the Playbook media folders. Can now copy files as usual. WiFi transfer rate is somewhat slower than with UBS (about half the speed), but fast emough to be very usable.

Cleaner shortcut
        Rather than use the obscure Playbook IP (\\192.x.x.x) the shortcut 'target' can be the "Tablet Network Name" (found under Storage & Sharing). The Playbook comes with a defalt name (PLAYBOOK-CBF3), but this can be changed, so I did, picking a name I like. I suspect this provides some security (effectively a quasi-password, well maybe not, because the ID address is still going to work) without assigning a password to WiFi file sharing. Now the desktop shortcut target looks like (\\MY-CUSTOM-NAME)

Folders
        On the PC the file structure is a little weird. Most folders are at the first level, but a few are hidden. A 2nd expanded set of folders is found under misc/android. Many are copies of top level but there are some new one. Still deeper down in a stange place (under DCIM, whatever that means) are found the both pictures and video taken by the camera

                        camera pictures and videos:             misc/android/DCIM/camera

Video file formats
File conversion --- Freemaker Video Converter
(update 3/6/12  --- Have used this program a lot and it works great. Easy to use with a batch load, easy choice of output format and resolution reduction, and totally reliable. (Best run overnight for long conversions.) Another nice feature of this program is you can load a file and it automatically tells you the video resolution and audio sampling.

        I saw a half dozen file converters mentioned in varius forums. I tried (free) avidemux, basically a video editor, but horibly complicated to use. I could never get it to work correctly as a file converter. The 2nd one I tried (Freemaker Video Converter) does the job nicely. Free, just a converter, very easy to use. Very easy to use: load file, select output format, it does the rest. (not yet tried, but I think files can be stacked up for conversion).

Video tests
         I ran a bunch of test with FreeMaker Video Converter to figure out the best format and resolution to choose for pre-converting .ts files. In initial test with short test files I didn't see any difference between .avi and .mp4 formats. No quality difference, no motion artifact difference, so significant file size difference. Both are 1/3rd or so the size of .ts files, which I think may have some error correcting stuff in it since it is designed to be a transport stream. Somewhat arbitrarity I picked .avi and converted three HD one hour captured 'Office' TV shows.

       While these .avi conversions play fine on the destop with KMPlayer, not one of them played correctly on Playbook! A real surprise since earlier I had tested short .ts files, both SD and HD converted to .avi format I had no problems. Don't know what the problem is. One 'Office' won't open at all. The other two play correctly, but both give an error is the slider is advanced, which is kind of important, because it's needed to jump commercials. So I ran additional tests, this time doing additional formats. This time I see a significant difference with .wmv format having an advantage over .avi and mp4.

       The advantage is this: With with (a short) .wmv video, when I pause the video and move the slider slowly, I get a clean stream of still images with only a little shift needed to give a new image, but the image sequence is much more crude and jumpy with the other two formats (.avi and .mp4). Thus it should be easier to jump commercials with .wmv. In these tests with a short file (2 min) I don't see the problems I had with hour long HD files.

                         .ts (original file)                170.2 mbyte                     (2 min of SD)
                        .wmv                                       40.9 mbyte
                        .avi                                          40.0 mbyte
                        .mp4                                       38.1 mbyte

        So I converted a different one hour Office to .wmv format, and its unwatchable, full of jumps like it missing frames. An earlier .wmv file was fine. For some reason the Playbook video player is touchy and is not handline one hour videos well. This makes preconversion tricky.

MP4 is 'Recommended'
        Blackberry documentation says .avi, .wmv and .mp4 (and other variants) are "supported", but it "recommends" the mp4 format for playing video on the Playbook. Maybe this is a clue that it knows that it doesn't handle formats other than mp4 well. Playbook records its own 1080p videos in mp4 format.

        I suspect this may be the case after converting three one hour HD programs from .ts format to .avi at full resolution. On Playbook one would not open and the other two gave an error (and closed) whenever the slide bar was advanced. The conversions I think are fine since KMPlayer on my desktop played them with no problem. While short (few min) .avi files worked OK, the Playbook video player apparently can't handle long, hires, .avi files.

Video fix --- MP4 (720p resolution)
        From the same master .ts files I reconverted again, this time to MP4, and I lowered the resolution one step to 720p (1280 x 720). These files play fine on the Playbook. (Didn't take the time to see if it was the change to MP4 or lower resolution that made the difference as it doesn't matter.) After running some quality tests, here are the resolutions I think best. Resolutions that give minimum file size with little to no reduction in quality on this small screen:

 1.6 Gb/hr          HD  TV capture (1920 x 1080  16:9   38,810 kpbs  29.97 fps)  =>   HD 720p
                                      (1280 x 720   3,273 kbps  29.97 fps)
 0.8 Gb/hr          SD   TV capture (720 x 480        4:3      8.500 kbps  29.97 fps)   =>  TV Quality
                                       (640 x 426     1,718 kbps  29.97 fps)

Lower video resolution
        It took me a while to realize the FreeMaker Video Converter can also lower resolution, which might be a good tradeoff since the Playbook screen is small and lower resolution means more video will fit into Playbook. As a test, I saved a very sharp HD 10 min video capture from PBS (Max Rabb and his orchestra) in four lower resolutions, all in mp4 format. All preserved the 16 to 9 full screen shape and all were very watchable. Size reduction is about 3:1 for no resolution change [1080p (1920 x 1080 size)], 4:1 for 720p (1080 x 720), 5:1 for 720 x 405, and 6:1 for 640 x 360. I think best choice for hidef material is 720p size, the loss of sharpness from the 1920 of the .ts original on the small screen is neglible. The lower two resolutions would probably be fine for old SC TV comedies. The sound sampling is not changed when the video resolution is lowered.

        The big test is a one hour conversion to mp4 at 720p size reduction. We will see how, or if, this plays. Plays fine.

Document handling
        It took me quite a while to realize that Playbook come an app preinstalled ('Docs to go' by BB) that allows you to compose documents. It's a pretty full featured editor (colors, fonts, bullets, indents, etc). It saves files in .doc format under 'Documents'. Obviously, here is where an external bluetooth keyboard is useful.

App file managers and html and pdf files
        The Playbook handling of local html files is a mess. A local html file opened in the browser works well, all the links external and interal work, but the built in tool from Blackberry do not even show these files in memory much less open them. As a test, I copied over three different file types [.doc, .html and .pdf] to the Document folder.

Playbook
         Documents to Go                                              doc
          Adobe Reader                                                    pdf
          File Manager icon                                             doc, pdf
          Air Browser (app)                                             doc, pdf, html
          File Browser (app)                                            doc, pdf, html
Desktop computer
          desktop Explorer (via USB or WiFi)              doc, pdf, html

        Clearly Documents to Go and Adobe Reader only display the type of files they support. The only way to work with local .html files (or even to see if you have any local html files in memory!) is to get an app file manager. I tested two: Air Browser (free) and File Browser ($0.99).  File Browser is (by far) the most sophisticated program. The 'File Manager' that comes installed on Playbook is pretty much of a joke. Both app file managers tested display and can open local .html files in the browser. Once open in the browser local html files work well, all the internal and external links work. I installed a local html file as the homepage for my browser in the format:

                                                            file:///accounts/1000/shared/xxxxxxxxx.html

Comparing various text formats
        As a test when going on a trip to ME, I exported a draft Amazon review I was working on my desktop in four different formats to Playbook: .doc (two different .doc formats), .txt. and .html. One .doc would not open (unsupported format), the other .doc opened in Docs to Go.

        Suprisingly when I click .txt file in a file manager, I have the option to 'Edit' (not 'Open') it. This brings up a curious little 1/3rd screen edit window. It's like the Playbook version of Windows Notes! A develop's scratchpad? I haven't seen it mentioned anywhere. It works, but there appears to be no way to expand the little window, so it's barely usable. There are a couple of .txt notepad type apps, but both have terrible reviews.

        As far as I know, while .html documents can be viewed, they cannot be edited on Playbook. 'Opening' an html file in a file manager opens it in the browser. For $1 there is an app (HTML Viewer) that will show the source code of pages online.

Browser handling of pdf links
        The Adobe reader searches out and opens pdf files, but it is not well integrated with the browser. Clicking on a pdf link in browser window should just open the pdf file, after all Playbook pdf reader come preinstalled. Instead the only option is to download the file, then a window asks if you want to open it, and you enter the Adobe pdf reader. It works, but it takes extra steps. The pdf reader appears to only scroll horizontally by pages.

Music file order
        I have a large library of MP3 music files. I want them to display in alphabetical order by filename and to get them to display this way on my Sansa MP3 music player and Kindle I used a utility to strip all MP3 tags. I find this works too with Playbook. (It guess is pretty much as work as there is nothing else to sort on, besides filename.)

        In preparation for a trip to NYC to see Book of Morman musical I ripped the Morman audio CD and put the 16 MP3 song files in a subdirectory under Music. The rip gave MP3 files with lots of tags and I did not strip them out. I found the native Playbook Music player uses two different sorts! A show CD has the songs ordered as they are in the show, so (obviously) this is how I want them on the Playbook. I found the Morman songs under 'Albums' and here the order was correct, same as on CD, but the Morman songs also appear under the 'All Songs' tab and here the order is different!

        I found the Morman songs (with tags) sort order in the All Songs area to be alphabetical. Since all the Act 1 songs start with 'Act 1" and Act 2 with "Act 2", and this is the only album I have on the Playbook, all the Morman songs were together with Act 1 songs first. The problem is within the acts the songs are not in the correct order, they are alphabetical not in the order on the CD. I proceeded to try and clean up the sort order by renaming the files Act 1a, Act 1b, etc, but this didn't work! A search of the tags shows the rip produced files with  'Title' tag the same as the filename. So it looks like Playbook in the All Songs area is sorting on a 'Title' tab if there is one, and filename if none.

        I don't what controls the sort order in the 'Album' section. Playbook somehow knows the track number, but I can't find the key tag, there is no tag named 'Track' or 'Number'. Browsing I find a lot of people in general pissed off about music sorting with MP3 players. Some people want the play order by tracks and some want the play order alphabetical. The former is logical for a single album, but the latter is more logical for a long listing. The complaint is that almost no player gives an option, they just do it one way or the other. Renaming a huge number of files to get an alphabetical listing can be a huge amount of work and should not be necessary.

        Another music detail. Before I could tell Media player I wanted the ripped files in MP3 format it had already ripped several songs to its default wma. It then would not rip again, saying album was already ripped. I find an album of mixed .wma and .mp3 files works fine on the Playbook. (I read the Ipad will not play .wma files.)

Camera and video
Camera
        Swipe down from top gives camera options. Camera has image stabiliztion which can be toggled on/off. The video resolution can be controlled: HD 1080p, or 720p, or 480p. Exposure/time has setting of Auto, Action, Whitboard. The snapshot cameras, both front and back, appear to have no resolution adjustment, they run at full resolution all the time. The quality of the 5 mpixel camera and 1080 video is quite good. A lot of YouTube video shows how well the video works even at night.  Based on a couple of minutes of video I shot in NYC (in hotel lobby and at night) the video quality is not bad at all.

Camera video and picture file sizes
        These are my estimates scaling up from 1 min of videos I took (inside at night)
                    1080p                                     123 mbytes/min
                                                                     7.4 Gb/hr  (or 8 min/Gbyte)
                     720p                                        60 mbytes/min
                                                                     3.6 Gb/hr  (or 16 min/Gbyte)

                    Picture (rear camera)            500 kb to 1 mbyte (even though rear camera is a 5 mpixel camera)
                                                                          (file size seems to depend on content)

        Easy way to remember [video time vs available memory] is you get only 8 min per Gbyte runing the camera full out at 1080p. Time can be doubled (for a minor loss in quality) to 16 min per Gbyte by selecting 720p (tap '1080p' on video screen to bring up resolution options).

Playbook video test (5/12)
       A test with a short HD 1080p video I made at night in Times Square indicates that the the file size of Playbook generated vidoes are really large. This video was a little less than 2 min (108 sec) and came in at 211 Mbyte, which is equivalent to about 7 Gbyte/hour! I ran this file through FreeMake Video Converter with NO change in resolution and its file size dropped x3.4 to 62 Mbytes, or about 2 Gbyte/hour, and even viewed on a large screen TV there was no loss of quality.

Time lapse photos
        The Playbook is a computer connected to two good quality cameras (front and back), so it has the hardware to do time lapse photography. I did a search and sure enough there is a Playbook app for that called 'Lapse Master' ($1.00), so I bought it. Easy to use. Takes photos (1024 x 600 max) using either camera with spacing of 5 sec min.
Starts when you tap red button on camera screen. Flashes 'processing' in upper right corner after taking each picture. You can choose to have time stamp put on each picture (lower right corner), which is handy.

        I discovered one interesting use for this program. It's good for taking a series of self portraits. Set it for 5 sec and try a bunch of poses. There's no camera I know that will do this automatically. It's like being in one of the old photo boots.

        The drawbacks are that it only takes pictures in .bmp format, so the file size is huge (2.3 Mbyte), and the playbook (even though its screen may be dark) is active and runs warm, so it needs to be plugged in if the time lapse sequence (like a growing plant) is to last more than a few hours. I emailed the developer and he tells me it's not .jpg, because with the conversion routines he had it was taking up to 30 sec to convert from native format to .jpg. The picture files show up in a named subdirectory, not under 'Camera' as you would expect, but under 'Documents'. I noticed that after my feedback, the developer added a note to his App info about the size of its .bmp photos and that users should 'clear out some space'.

Screen capture
        A nice quasi-camera feature is screen capture. A push of both + and - volume buttons puts a hires screen capture into the folder with pictures taken by the camera. It is a true screen capture. If you finger expand, you capture only what is show on the 7" screen. This is a useful documentation feature. For example, I looked up the GPS coordinates for my home, then took a screen capture to save it. Can capture any image off the web.

Sound
        From threads on the web a lot of people think the Playbook has great sound. I certainly think so. It has dual (strereo) front facing speakers (inch long slots on each side of the screen). I found this info on a thread:

                    Playbook sound chip                     Wolfson WM8994E audio codec
                    Kindle Fire sound chip                 TI AIC3110 Low power Audio Codec with 1.3W stereo
                                                                                    Class D speaker amplifier

Playbook teardown
        Huge number of pictures at this link:
         http://www.techrepublic.com/photos/blackberry-playbook-teardown/6220365?seq=49&tag=siu-container;thumbnail-view-selector


Playbook battery --- 5,400 mAh, 20 Wh


Teardown shows batttery occupies about 1/3 of interior volume
Battery left, circuit board center, ??? right

BB Podcast app
        For years I have heard a mention of 'podcasts' on TV, but never paid any attention, never even did a Google on my desktop. Playbook comes with a built-in app called 'Podcasts' and after having Playbook a few months I finally opened it up. It shows a huge list of podcast sources, but the one that caught my eye was Praire Home Companion, which offered 100 'Lake Wobegon' episodes (about two years worth).

        Downloading podcasts is easy. Just tap 'Download' next to the podcast episodes you want, and they stack up and automatically begin downloading. If there is already a download in place, the 'Download' changes to 'pending'. The problem I found it this. I had selected a video podcast as a test (300 Mbytes), and it was in the downloading phase for two days and still only 200 mbytes had come in. (I now suspect the reason it was so slow is that it looks like the podcasts only download when the Podcast app is open.) Meanwhile all my much shorter audio Lake Wobegon podcasts were stacked up behind it. When I canceled the video download, the Lake Wobegon downloads started automatically, and I found each (5 to 10 min) Lake Wobegon talk downloaded in only 5 to 10 seconds (via WiFi). In 20-30 min I had downloaded all 100 Lake Wobegon radio talks (episodes) occupying a total of 600-800 Mbyte of memory. These podcasts need to be played from the Podcast App.

    Cons: Big cons with the BB Podcast app is file management and memory usage, it does a bad job of both. Podcast can be large (especially video podcasts), so it's all too easy to burn up a lot of memory without realizing it.

        First issue: Where the hell are the (downloaded) podcasts stored, how big are the files, and how to delete them? Apparently they are stored inside the Podcast app (memory space) and this is inaccessible to file managers. 'Podcast' does not appear as a top directory listing in file managers, but it can be found deep under Android, but the downloaded podcasts are not there. A google search found others having the same problem as me with one poster saying (reasonably) they are probably stored within the app. The memory problem is compounded because the Podcast listing does not show the file sizes. (The file size does show during a download.)

        A further problem is how to delete podcasts, because there is a trap. Neither of my file managers will show the downloaded podcast files, so you have to do file management within the Podcast App. Under 'Podcasts/Downloads' there is an 'x' next to each podcast, but according to posters this 'x' does notdelete the podcast from memory, it only deletes it from the list! To delete a podcast from memory do this: tap 'My Podcasts', 'Episodes' (upper right hand corner). This brings up a similar list of downloaded podcast files, and according to posters tapping an 'x' here deletes the podcast from memory.

        I notice another annoyance. I now have 100 Lake Wobegon episodes plus one Crackberry video podcast. The 'Episodes' podcast list appears to be alphabetical, and I see no way to change it. I would (of course) like to listen to episodes chonologically (and I would think this would often be the case with podcasts), but this is not how they list under Episodes. I find this

                June 23, 2012: The News from Lake Wobegon
                June 25, 2011: The News from Lake Wobegon
                June 30, 2012: The News from Lake Wobegon
                June 4, 2011: The News from Lake Wobegon
                June 9, 2012: The News from Lake Wobegon
                Mar. 12, 2011: The News from Lake Wobegon

        Oh yea, essentially a random chronological order, because it's a letter by letter alphabetically sort and PBS has not named the podcasts with this in mind.

Two podcast lists are ordered differently
        But all is not lost, there are two downloaded lists in this app. The downloaded podcasts are also listed under 'Downloads', and here I find them ordered chronologically, but I don't this is a true chronological list. It looks like a list ordered by how the podcasts were stacked up. Available episodes were listed in the order broadcast with most recent at top. I went down the list tapping download. Now I find the order of 'Downloads' is the oldest at top and newest at bottom, with the my first ever (video) podcast at the very bottom. So it's pretty clear that it's a pushdown stack with the last podcast downloaded put at the top. This is good if you regularly download new podcasts as you find new ones at the top (it takes a lot of scrolling to get to the bottom of a 100 podcast list ). So starting off the best was to do set up a lot of downloads is go down the list and tap 'Download' from bottom to top (oldest to newest). This will then result in the newest coming out on top.

        A really annoying thing about the Podcast App, which I saw others complaining about, is that the delete 'x' is not designed right. You have to click just so to the left of the icon, otherwise the podcast begins to play. I deleted all 100 and it took multiple taps for every episode! I checked memory space and it went from 1.1. Gbyte to 1.7 Gbye with the 100 Lake Wobegon episodes deleted.

        The two differently ordered lists, of course, make good file management near impossible. After reading a podcast (selected from the list whose order I can control), I would like to then go to the other list to delete it and free up memory, but in the other list it's going to be somewhere in the heap! File management is a mess due to poor planning by the programmers. The only reasonable option is to wait until all downloaded podcasts are read and then download the whole bunch of them. If I download two years worth, this could be a very long time, so maybe it makes sense to download them in batches, say 6 months worth at a time.

Privacy
        Blackberry is a business staple and concern for security is supposed to be one of the selling points of the Playbook, so why then is so freakin hard to make files on the Playbook secure, to hide them. As I detail below, moving files works to hide picture files, but not video files. Unfortunately, while cut and pasting is easily done from desktop Explorer (via usb or WiFi) neither built-in File Manager nor Air Browser appears to be able to do this. Later from a poster recommendation I acquired another file manager, the app called 'File Browser' ($0.99), and it does allow folders and files to  selected and moved (cut) and copied.

Video files
                I ran tests with a short video file (mp4). I moved it all around in the Playbook memory, but it in all the directories and in subdirectories nested five or six layers deep. Doesn't matter where you put it, it shows up under the Video icon. Sprinkle five copied around memory and you get five files shows under Video. It is simply not possible to hide a video file by moving it the 'wrong' directory, the video application appears to scan all directories looking for files it supports!

        What does work with video files is to change the suffix, but just removing the last letter is enough.   [.mp4 =>.mp] or [.avi => .av] will hide the file from the prying Video application, but of course this must be reversed to play the file.

Picture files
        However unlike video files, my tests show it is possible to hide picture files my moving them. Pictures organized in memory by subdirectories display under the Picture icon by Subdirectory.

        As a test I made up the subdirectory 'Private' and put in it a subdirectory with photo files. I then moved the Private subdirectory around to see what happened. This is easy to do by moving with files over usb or WiFi from a desktop computer while watching the picture displays under Pictures. When Private is moved to a folder that hides it, the picture subdirectory in it automatically erases from the screen. It is not possible to made a new folder at the top level (media).

                                         Books                         hidden
                                         Misc                           hidden
                                         Music                         hidden
                                         Print                           hidden
                                         Videos                        hidden
                                         Voice                          hidden

                                         Photos                        not hidden
                                         Camera                       not hidden
                                         Downloads                 not hidden

        This all makes sense when I look at the display under the Photos icon. The three directories that do not hide photos all have (default) boxes on the Photo start screen labeled: Camera Pictures, Downloads, and Pictures. There's also Wallpaper (subdirectory) with a box, but I don't where in memory the wallpaper images are.

Solution to file privacy problem --- File Shield
        An excellent solution to the file privacy problem is an app called 'File Shield' ($0.99). It makes it easy to hide and unhide files and directories without passwords. To hide a directory start the app, it opens in a file manager, to the right there is a button which toggles between 'Make Private' and 'Make Public'. That's all it takes! When a file or directory is made 'private', not only doesn't it show under the Video or Photo icon, but it disappears from file manager views too. This is an excellent solution to the Blackberry Video application which searches out videos everywhere in memory, and for photos it is much simpler than moving directories around (using 'File Browser').

        When I started using the program, I found the 'private' and 'public' tags hard to discern because they looked so much alike. I suggested to the author that he use color to visually separate them, he did, and the program is now much easier to use.

Reset
        I once started googling to find out how to do a software reset in Playbook, and then realized that it was hiding under my nose. Under the battery charge icon (top, right) one of the options is ReStart. An annoying little feature of the Playbook is how long it takes to soft boot. I have not timed it, but I bet a ReStart takes about 3 minutes! In practice this matters little since most of the time Playbook is turned on/off by putting it to sleep (Standby) with a swipe. The almost impossible to use power button, which at the introduction of Playbook got a lot of critism, I almost never use. No need to with sleep and soft reboot available from the screen (tap battery icon). Only when Playbook locks up (a few times in six months) must it be pushed as part of the hardware reset procedure.

First week notes
Hang on power down!
        On my 2nd day Playbook began to act strangly refusing to run open any files (saying media not supported), so I hit Restart and a splash screen came up that it was shutting down. The battery was about 50%. A couple of minutes later I saw the screen was black I attempted to repower by pushing the power button. No response to repeated pushing. (Even using a headphone jack to push it it has so little travel you can't tell if its really pushed or not, there's no tacticle feel. Yikes, I can't power it up on 2nd day!  The only other thing I could think of to do was to connect USB or charger. Yikes, about 10 min after hitting the (software) Restart the screen suddenly came on saying "Turning off Playbook", but it seemed to be stuck there. Yet it was at least partially working since it rotated when I rotated the tablet. Pushing power button nothing happens. Plugging in the USB I get no sound and it does not mount on computer.

     It is hung in the power down state. Now what?
     I seached to see if there was a hardware reset. There is.

Hardware reset
       Push and hold three buttons for 10+ sec:     Vol+, Vol-, power button

       A google search shows there is a hardware reset on the Playbook. Hold down the Vol up and Vol down and power button for 15 sec. Not so easy to do reliable considering the power button is recessed. Well I did it and in 3-5 sec the 'Turning off display" shut off, but then nothing, but it seems to have worked. After letting it sit a minute or so, I pressed the power button and in a couple of sec the red led came on, then the start splash screen, and it powered up OK. Why is none of this in the (long) manual! A power up boot takes a minute or two. Another reference said, hardware reset was just two buttons (Vol- and power), but I tried it and it this doesn't work.

Reset to factory state (lose all stored data)
        With device off attach USB. Windows explorer will say can't communicate. One option in Explorer screen will be 'Update'. It looks like this is a reset to factory state (not totally clear).

Volume buttons not working or are they?
        For three days after I bought Playbook I thought volume buttons didn't work because when I pushed them nothing happened. When I read that a poster said her volume buttons stopped working when she upgraded to OS 2.0, I figured it was an upgrade bug. so I included this in the first draft of my Amazon review. Two commenters straightened me out, explaining that they at first thought the volume button didn't work too, but it's just that they work incrementally so you need to repeatedly tap them.

Bluetooth keyboard (Update June 2012)
        I bought the cheap ($16) bluetooth keyboard (below) from Amazon. The only reviewer of it to mention Playbook said it did not work with Playbook, but after researching Bluetooth profiles it seemed to me very likely that it supported a compatible bluetooth format.  I was right, it does work with Playbook, so I published the review below to make this known. Good keyboard for traveling, while it does not fold up, it weighs next to nothing.

Title: Works with Blackberry Playbook, June 22, 2012
                By Donald E. Fulton (Stoneham, MA USA)
This review is from: SANOXY Bluethooth Keyboard for iPad

        One previous reviewer (Rafferty in May 2012) reported that this keyboard does not work with Blackberry Playbook, but that's incorrect it does work. The side of the box says (in tiny print) that the keyboard supports "Bluetooth HID protocol", and this is the bluetooth protocol used by Playbook.

This procedure will pair the keyboard to Playbook

1) Insert two batteries and set keyboard on/off switch (on back) to ON
2) Go to Bluetooth section of Playbook settings
3) Push black button on back of keyboard marked 'Connect'. The blue led on front of keyboard will begin to flash
4) On Playbook bluetooth screen tap 'Add a new device'
5) Playbook in a few seconds should report Found Devices: 'Bluetooth 3.0 Keyboard'. Tap this line (important)
6) Six digit number (really two three digit numbers separated by a space) should pop up on Playbook with instructions to type this number on the keyboard. (This will be the encryption code between them and is different each time.)
7) Type the number on keyboard as six digits (no space) followed by Return (Return is required.) You have about 30 sec to do this before a timeout.
8) Playbook should report pairing successful (HID format) and the flashing blue led will turn off

        However, I found there is a trap to be avoided. If you are connected and then disconnect by tapping the 'Disconnect' button on Playbook, you can have trouble reconnecting. Now when you try the procedure above, Playbook reports it can't find any bluetooth devices. The solution I found is to delete the keyboard from the bluetooth settings, and then do the procedure above.

        I find after pairing I can switch off the keyboard power, and later when I switch it on again the keyboard is still paired with Playbook, no need to resync.

        The top row of dual action function keys on this keyboard are set up for Apple and Ipad and as far as I can tell do nothing on Playbook. I have no experience with Apple keyboards, but I find it hard to touch type on this keyboard as the keys have almost no travel.

        It's tricky to use a separate keyboard with a tablet because you need to both type and look at the small screen at the same time. On a trip to ME I found a set up that worked. A table next to a motel pool had a center umbrella. I leaned the Playbook against the umbrella pole at center of table, put keyboard in front and was able to type away to write a long Amazon review.
--------------------------------
Pre-purchase notes on bluetooth keyboard
       Very cheap bluetooth ($16) keyboard at Amazon. Its useless Amazon spec doesn't say what bluetooth profile it supports!

         http://www.amazon.com/gp/product/B004HCO4GI/ref=ox_sc_act_title_1?ie=UTF8&m=ARK124NKBQ4LI

        I am considering buying the inexpensive ($16) bluetooth keyboard above to use with Playbook. Not for use at home, but to allow longer emails to be written on vacation if Playbook is the only computer I have.

        In fact recently before this keyboard arrived I found myself in Maine with only Playbook for a computer. I had to answer (free) consulting questions and found that with a little patience and time I was able to write quite a long email on Playbook. I'm not sure if this keyboard is really going to be much of an improvement. Except for short bursts you need to be able to see the screen when you type. You got to be pretty close to a 7" screen to see it, so need to find a setup where I can touch type on the keyboard and at the same time see the Playbook screen. (pending)
        The challenge is whether a cheap iPad type keyboard will work. The literature seems to say only some bluetooth keyboards work with Playbook, that there are two different bluetooth keyboard profiles. The cheap ($16) bluetooth keyboard I am considering has one review that mentions Playbook, and this reviewer says it doesn't work with Playbook. A poster who bought what seemed to be the same keyboard (though a different name) says it worked with his laptop, but not with Playbook. This does seem to confirm that bluetooth keyboards work with some computers and not others!

      On the other had I think I read somewhere that any keyboard that works with Ipad, which of course, is the bulk of the market, will work with Playbook. Playbook manual says a bluetooth keyboard needs to support the bluetooth HID (Human Interface Device) profile, and this is confirmed by posters on Crackberry. When I check Ipad bluetooth profiles, the only one Apple Ipad spec mentions for a keyboard is HID, so this seems to say if it works for Ipad it will work for Playbook.

        A computer on Ebay (UK) is referenced by the poster (model VKxxxxx). It is physically exactly the same (for example LED is above F11 key), but a few keys are marked differently. The UK seller says it will work with Ipad and Windows 7 computers, but it will not work with Android devices, Macbook Pro, iMac. I read Android pairs to keyboards with something called SPP profile.

http://www.ebay.co.uk/itm/NEW-Bluetooth-Wireless-Keyboard-Apple-iPad-iPhone-PC-Windows-7-/170729173740?pt=UK_Computing_ComputerComponents_KeyboardsMice&hash=item27c04072ec#ht_3815wt_1270&clk_rvr_id=354921817488&afsrc=1

        I found what sure looks like the exact same Amazon $16 keyboard for sale on (US) Ebay ($24) and it does not say HID, but says it works with iPad, Android, PC and Mac, that it is Bluetooth 3.0 and backward compatible with other Bluetooth. It does not list any computers it does not work with. Three users confirm the Amazon keyboard works with Android.

 http://www.ebay.com/itm/Ultra-thin-Bluetooth-Wireless-Keyboard-Keypad-for-iPad-iPhone-Android-PC-Mac-/190683247286?pt=US_Tablet_Accessories&hash=item2c659b72b6#ht_3536wt_1059

       Bottom line, I think I will take a chance and order the Amazon 11" size bluetooth keyboard, everyone likes it and great price. The pairing process with bluetooth keyboards can be tricky (a lot of people report problems and there are detail recipes to follow), so this may explain why the only reviewer who mentions Playbook (1 of 157 reviewers) said it does not work with Playbook.

WiFi
WiFi connect issues (July 2012)
        I have now taken Playbook on four trips. On my first trip (Edison hotel in NYC) I had no WiFi related connect problems, but didn't check the WiFi level in my room. I also on that trip confirmed that you do not need to remove a tablet computer from your bag at airport security!

        However, at my favorite motel in Kennybunkport ME I began to have WiFi connect problems. Over the years I have used my Vista portable at this motel in many of its rooms and never had a connect problem. At first Playbook worked fine. Using it on the porch outside my room I had no hint of connect problems, and I tried it by the pool and it worked there too. But that night inside the room I found I could not get a usable connection. I think I connected just once for a few seconds.

        Next morning I went to desk and asked to try a brief WiFi connect test in the two adjacent rooms, and it connected OK in both, so I changed to one of these rooms for the second night. While this room was marginally better, I found the same basic problem: worked OK outside on the porch, but the connection dropped repeatedly inside room. Playing around that night I noticed that holding the tablet vertical worked better than horizontal. I could sometimes hold a connection for a few minutes in portrait whereas in the normal landscape orientation it would not connect at all. On arriving home I researched WiFi connect issues with Playbook and tablets. It was only after this first WiFi connect problem away from home that I found out where the 2.4 Ghz WiFi antenna is in the Playbook and how holding the Playbook can affect it.

       I took Playbook to the premier hotel in Kenneybunkport (Colony) and found the signal strength hopeless in my room. It was one bar in the corridor a few feet from the room, and as I approached the room and went into the room all bars disappeared. On a stay in a motel at Ogunquit I again found it impossible to get a WiFi connection in my room with Playbook. On this triip I had brought my old Vista laptop too and found in the room it was marginally able to connect. In all these hotels I could always connect in the lobby and most public spaces. On a return trip to the first motel I found running the Playbook inverted (landscape) I got adequate WiFi signal strength in a 3rd room.

      My feedback (at desk and via email) to these hotels, who all advertise free WiFi, is that their Wifi strengths were probably setup for laptops, but they should now upgrade their signal strength for smaller tablets which appear to me (and from many comments online) to be somewhat less sensitive than laptops. I also make this argument: 'You wouldn't rent a room without water or electricity, and you shouldn't rent a room without working WiFi'.

     One or two times at the hotels I have lost my internet connection and could not regain it even though I had some bars of signal strength. The lady on one motel desk told me she had just "reset" the WiFi. So it appears to me another WiFi connection problem is hotel routers that may sometimes space out and need to be reset. I see this at home occasionally (maybe once or twice a year), where I have to unpower the router to reset it and get back online.

Tablets worse than laptops?
        It seems to be pretty common complaint from a lot of users that their tablets don't connect as well to WiFi as their laptops, some users saying there is a big difference in received signal strength and usable range. This makes sense to me in that a 7" tablet probably (?) has a smaller antenna than a laptop.

        Well, maybe not. I ran side by side tests with Playbook and my 12" laptop running WiFi monitor program inSSIDer, and the both report dBm values that are for all practical purposes the same. Since dBm is a measure of absolute power received, this would argue that the antenna size is the same. Several neighbors WiFi at about the -90 dBm level came and went on the laptop list of WiFi sites and Playbook was able to see some of these -90 dBm sites too, though less frequently than the laptop.

Antenna locations
        I found a post that (accurately) described the antenna locations in Playbook. Turns out the playbook has four antennas, one in each corner: 2.4 Ghz WiFi (upper left corner), 5 Ghz WiFi (upper right corner), bluetooth (lower left corner), and GPS (bottom right corner). The relevant thing, which I confirmed by test, is that your hand over the antenna for 2.4 Ghz Mhz WiFi, which is what is generally used in public, hugely reduces the received power (easily by factor of 10 to 20, but with my left hand alone I can make drops of 100 or even 1,000!). This explains why my connection at the motel was better vertical. In landscape orientation your hands normally hold the tablet at both ends, which means both WiFi antenna are covered! User report that the bluetooth signal is strong and that a hand over the bluetooth antenna has no effect. In contrast GPS signals are very weak, so a hand anywhere the GPS antenna in the lower right corner can prevent the satellite signals from being acquired.

Improving WiFi reception
        This means WiFi reception in landscape orientation can be greatly improved by just holding the tablet on the right side (with the right hand). I ran tests at home monitoring the 2.4 Ghz WiFi signal strength with and without my hand over the top left corner, and found your hand over the antenna can easily reduce signal strength a factor of x100 (20 dbm) or one or two bars.

        If you like to hold the Playbook with your left hand in landscape orientation as I do, a simple trick for better WiFi reception is just run the Playbook inverted (just flip it over so the 'Blackberry' logo is at the top). This puts the the WiFi antenna that is most commonly used in public (2.4 Ghz) in the lower right corner. I've tried this in hotel rooms where WiFi levels are often weak, and it can be the difference between getting online or not.

Monitoring WiFi signal strength
        What's really needed is an app that would display signal strength. There is one, (free) 'WiFi Mapper', but it will not install on my machine. But even without this WiFi strength can be observed in two ways. First the the top info bar of Playbook includes a 4 bar WiFi signal strength display. The dbm value of the received WiFi signal can be seen at Settings, WiFi. On this screen tapping the (lower left) WiFi bar icon brings up detail info on the internet connection, selecting 'WiFi Information' brings up a screen that includes the WiFi signal level. (Update rate on both these signals seems to be in the 10 to 20 sec range.)

        About six feet from my router my WiFi level is -36 to -41 dBm (4 bars) dropping to -62 to -66 dBm (3 bars) with my hand over the top left corner. A drop of -36 dBm to -66 dBm is a factor of 1,000 and -41 dBm to -62 dBm  is slightly more than a factor of 100!

dBm explained
        I did not remember the details of  dBm from my engineering days. Wikipedia explains it is an absolute measure of signal power, each change of 10 dBm is a factor of 10 in power and 3 dBm a factor of 2.  [Ref: 0 dBm = 1 mw of power]. In general terms the usable signal strength of WiFi varies about a factor of 10,000 from about -40 dBm (100 nW) to -80 dBm (10 pW).

        Wikipedia says GPS signals from satellites are typically 100,000 times weaker than the weakest WiFi signals (-128 dBm)! I find it totally amazing that an antenna which can't be more than one square inch can pick up signals from (several!) satellites. The fact that this is possible comes down to signal averaging combined with super low BW that allows a signal to be pulled out of the noise.

WiFi bars vs dBm
        Results from a few WiFi tests I ran with Playbook.

        - 40 dBm                4 bars    (six feet from router, antenna unobstructed)
        - 60 dBm                3 bars    (bathroom, door closed)
        - 75 dBm                2 bars    (bathroom, door closed, antenna partially covered)
        - 82 dBm                1 bar      (hand under top left WiFi antenna, bathroom, door closed)
                                                     (normal internet access at one bar, -82 dBm)

        Note just a normal left hand hold (in upper left corner) of playbook can reduce signal strength 20 db, which is a factor of 200 in power (-60 dBm to -80 dBm)!  When the level drops to -90 dbm, WiFi connection is lost.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes prior to purchasing Playbook (Feb 2012)

Keyboard, mouse and case
        RIM has demoed at shows a neat accessery for PB: combination [keyboard + touch pad + case]. The keyboard is same width as PB, so it sort of makes the PB into a portable computer. PB can be used with bluetooth keyboards and USB keyboards and mice too of which there are many at Amazon, but the RIM looks best. Price tbd. (Be careful of USB powered keyboards, one is reported not too work because it needs 250 ma, which is more than PB provides. Also makes no sense to power keyboard with 2W when the whole computer dissipates about 2W (10 hr with 20 W-hr battery)

Added storage
        Hackers learned out to 'root' OS 1.0, which has allowed the USB port to be used for additional storage,  most useful being key flash storage. USB has to be converted to 'host' mode to read external memory.

        -- There is a 500gb wireless hard drive that will work with playbook it is called  Seagate GoFlex Satellite 500GB Mobile Wireless Storage. There allso is a way to print with a hp e-printer the printer has a e-mail address that you can send a e-mail with a attachment and it will print the attachment, photos on photopaper and documents on regular paper to print a web page use the copy arrows to copy what you want then paste it in the word proccer that came with playbook save.
           http://www.amazon.com/review/R1J7HEJEFIKOC6/ref=cm_srch_res_rtr_alt_1

        Yup, this $180 drive is designed to stream movies to Ipad, but one reviewer says it works with its Playbook. Cool device. It weighs 0.6 lb and runs off built-in battery for 5 hr and connects via WiFi (it sends out WiFi, 30 ft range), so people travel with it to bring a large movie library. "Use the free app or your device's web browser to easily access and stream your media library wherever you are."

Video Formats
        Here are the supported video formats on Apple Ipad. The PB video formats are similar.

             Media Type (Codex)            File Extension                                       Limits
             ------------------------            ----------------                                      -------------
                   H.264                           M4V, MP4, MOV           Video: Up to 720P, 30 frames per second
                   MPEG 4                       M4V, MP4, MOV           Video: Up to 640 x 480 pixels, 30 frames per second
                   Motion JPEG               AVI                                   1280 by 720 pixels, 30 frames per second

Playbook ---  File extensions: MKV (used for hidef), MOV, MP4 MPEG-4, AVI
                       Codex: H.264, MPEG-4, MPEG-2

Transcoding
        Video file conversion is called 'transcoding'. For video conversion one poster recommends the free program 'MediaCoder'. He says you need to play around with the bit rate to see how fast your tablet can handle. Another suggest VLC, saying there is a wizard.

        http://www.mediacoderhq.com/

VLC
       My VLC has no wizard but it does do conversion, but no defaults!. I set scale=1 and out came .ps file. It plays, but no sound, and screen has artifacts when there is motion. Can't make this work.

.ts file parameters
        KMPlay reports the following for hidef Office capture
General       Format                           MPEG-TS
                     Overall bitrate               16.1 Mbps
                     Size                                3.37 Gb (29 min)

Video           Format                            MPEG version 2
                     Frame rate                      29.97 fps
                    Bit Rate                           14.6 Mbps
                    Nominal bit rate              38.8 Mbps
                     Width                              1,920
                   Height                             1,080
                     Scan type                         interlaced (this is a surprise)
                     Stream size                      3.06 Gb

Audio            Format                            AC-3
                      Bit rate                            384 kpbs
                      Sample rate                     48 khz
                      Stream size                      82 Mb

        -- A .ts file is an MPEG ‘transport stream’; it's not at all the same container as a ‘program stream’ (typically .mpeg). Resolution has nothing to do with it. Transport streams can contain multiple independent groups of video/streams, and have a load of error correction data (making .ts files bigger). They're typically used for broadcast systems where multiple channels are multiplexed and the transmission medium may be unreliable. For PC use where file integrity is (hopefully) assured, you will save space and improve compatibility by converting to a Program Stream. – (which I think is .ps)

        -- To get better interoperability, I recommend converting the container from TS to PS. Virtually every piece of software that can decode TS can decode PS, so it's almost always better to have PS file. One of the simplest remuxing tools I've found to use is avidemux. Just choose "copy" for the video and audio streams, and choose the "PS" container format for MPEG.

        I downloaded and installed:    avidemux
         This seems to work
                        Ans     Yes index file
                        Leave (default) 'Copy'  for video and audio
                        Select Format    example AVI
                        (do not Go or play) Select save (conversion starts)

        -- .TS files are technically just MPEG2 files at a very specific resolution. You can use pretty much any converter (avidemux, handbrake or even ffmpeg directly).  But the only reason to do so would be filesize. Mpeg2 files play pretty much everywhere. The only confusing part is the actual file-extension. You can safely and freely rename them to .mpeg.   (not sure if other posters agree)

KMPlayer vs VLC
            KMPlayer plays a .ts (MPEG-2) file regardless of how I change the suffix (even .mp3). Weird!  VLC will play with different suffixs too, but not with .mp3.
            KMPlayer plays a hires .ts (Office) file cleanly. VLC has motion artifacts.

Comparing Playbook and Kindle Fire
        Kindle Fire and Blackberry Playbook have the same processor, same TI chip set and same graphics chips. No wonder the resolution is the same, and they are even reported to be made by the same manuf in Taiwan. Playbook runs Flash and supports HTML5. Playbook also has BlueTooth. Fire has no hardware volume control, Playbook does. Playbook does HD 1024p video with its 5 Mpixel camera,  roughly 2.4 Gb per hour (nope, my tests with a short 2 min video extrapolate to something like 7 Gbyte/hr, but post processing can shrink it). A check of my .ts file capture shows SD Big Bang at 0.6 Gb for 30 min and HiRes Big Bang is x3 more at 3 Gb for 30 min. Hence only about three 30 min HiRes TV shows (@ 3 Gb a show) are going to fit on a baseline 16 Gbye model.

        Might make sense to pay $50 more and buy the 32 Gb version. (I did) This would allow eight 30 min HiRes TV shows to be stored. I wonder is there an app that will play .ts files or .flv (Flash Video) files, which are same .ts files?   Playbook natively supports MPEG4, which is format of some YouTube videos downloads.  MP3 audio files are supported. Looks like captured TV video files in .ts (of .flv) format would need to be converted, hopefully on the fly. It there an app for this? There seems to be: an Amazon reviewer says he can play .flv files on his playbook with $0.99 app MovieFlvPlayer, which I find discuessed in Playbook forums. (new OS 2.0 just broke it)

Supported Playbook media types ---    http://docs.blackberry.com/en/smartphone_users/deliverables/27267/Supported_Media_Types_on_BlackBerry_Tablets_(English).pdf

        The big thing about Playbook is price. Less than a year ago it was introduced at $500. It has not sold that well to public says NYT and the price has dropped drastically to 199. NYT says they are losing 200 dollars on every unit (take with a grain of salt), that the parts alone cost about the selling price. Blackberry site sells base unit of 199 with free shipping.  Amazon is $15 bucks or so higher. Do you think this has anything to do with it selling Kindle Fire??

        Playbook has built-in real GPS hardware (with antenna) that locks onto satellites, and I read it works even without an internet connection. Apparently Bing maps (vis internet) use the GPS function, maybe to give you navigation. (this sound cool)

Playbook vs IPad Youtube compare (side by side)
         http://www.youtube.com/watch?v=4KvYiOv4efI&feature=related
         http://www.youtube.com/watch?feature=fvwp&NR=1&v=GWG3ljfSmDI
         http://www.youtube.com/watch?v=s72rGDUn2uo    (by Blackberrry)

===============================================================================================

Nook HD 7" Android Tablet
        created: June 2013
               updated: Aug 19, 2013

Intro
        Nook HD is a 7" quasi-android tablet with a very high resolution screen. I like a bargain and for months in stores I had liked the look of Nook HD screen, so in early June 2013 when B&N opened the machine to the full android set of apps and it lowered the price from about 200 to 129, I bought one. It has only has 8 Gbytes internal, but it takes a microSD card, so for eleven bucks I added a 16 Gbyte card to give me a 24 Gbyte machine.

        Less than two months after I bought it, B&N announced it was discontinuing production of the Nook HD and 9" Nook HD+ (B&N ink readers will continue in production, but will be outsourced), which came on the market since Oct 2012, so as of Aug 2013 the price has dropped more, and it can be bought for 110. In July 2013 a new higher resolution screen 7" tablet (323 vs 243 pixels/in) came on the market for about twice the price of the discounted Nook HD. This is the 2nd gen (2013) Google Nexus 7 by Asus, a huge upgrade of the original Nexus 7 still in production. This device is probably the closest to Nook HD, a fast 7" Android device with a great screen and about same weight and same battery size, but with camera and missing a slot to add external
memory.

7" Nook HD specs
                 Screen                                                1,440 x 900    (243 pixels/inch)
                 Processor                                            Dual core, 1.3 Ghz  (TI Omap 4470)
                 Ram                                                     1 Gbyte
                 Internal memory                                  8/16 Gbyte
                 Expansion memory slot                       yes, up to 64 Gbyte microSD card
                 Weight                                                 11.1 oz (300 grams)
                 Battery (Li-ion)                                   15 watt-hr  (4,050 mAh)
                 Battery life (measured)                       4 hr (display max intensity)
                 Sound                                                  stereo speakers (rear), hardware vol up/down, 3.5 mm headphone jack, microphone
                 Connectivity                                        proprietary 30 pin connectors (supplied cable supports charging and USB 2)
                                                                                     HDMI cable available
                 Missing                                                no camera, no GPS
                 Operating System                                Android 4.0.4   (Ice Cream sandwich)
                 Date available                                     Nov 1, 2012

My favorite apps (12/14)
        Classical Radio, Candy Saga, Temple Run 2, Solitaire (by Mobility Ware), Music, Maps (google), ES file explorer, Fast Hotmail
        Essential utilities: WiFi Fixer, WiFi Analyzer, Battery, Galaxy (Andromeda) wallpaper, Play Store (Android apps)

Nook HD overview (my 7/26/13 Amazon review)
        Title: Cheap way to browse web and run android apps on a fast, beautiful display

        Great screen, no cameras, weak speakers, crappy battery life, compromised android OS, but an inexpensive way to browse web and run the world of android apps on a fast, beautiful display. Plus it has a microSD slot to hold lots of music and videos for offline viewing. And of course, its original purpose, to provide a slick interface for purchase and reading of magazines and books.

Pluses
        Wide range of browsers available. I have 9 on my machine. All browsers for tablets have reduced functionality so some browsers are better than others for specific tasks. For example, Firefox will play video in HD and does not redirect to mobile sites. Tint and Zirco have a homepage that will access a local html file. With several browsers installed it's easier to get around site restrictions. Firefox has an addon that auto-deletes cookies. Chrome allows spoken search inputs.

        The world of 700,000 android apps can now be accessed on Nook HD including big and nice apps: Google earth, Skype, YouTube in HD, Adobe Reader, WiFi Analyzer, Google maps, best solitaire ever (by MobilityWare), and free 'run' games. Custom moving backgrounds on Nook HD home screens are fun.

Annoyances
        In two months I have not figured out how to add a browser link to Nook HD home page. Some browsers have the option to add a link to the homepage, but it never works! (It must be that the Nook HD OS does not allow this)

        Poor battery life, by test I get only 4 hours.

        Adroid apps normally just suspend, so it tends to take too many presses and taps to cleanly start an application.

        Audio does not shut off when you exit most radio and music apps. With no OS support for shutting apps down I often have to resort to a reset to silence them.

        Built-in email has a short time window so you only see few or no messages. Apps like FastHotMail can provide workaround.

        Screen capture is clumsy (pushing Home and Vol- requires a lot of force and nearly simultaneous pushes).

        Nook HD not really useful for music, sans headphones, because sound volume on speakers is relatively low.

        Setting up icons on home screens is kind of a pain. Half of the main screen is taken up by a carousel that cannot be removed. The Nook recommended way of moving an icon to an adjacent screen is to hold icon overlapping the edge, but I find this hit or miss, it only seems reliable after a reset.

        File directories can be accessed via USB, but have some annoyances: Many file managers have a hard time finding personal files lost in a maze of OS directories. Nook HD allows deletion of its standard user directories (like 'kids B&N files') only to later write them back again.

        Tablet does not reliably remember setting. Occasionally I find the screen will be dim or the notification is too loud and when I look the setting have changed.

        No way (that I have found) to add personal data for quick entry.

(update) -- Bluetooth keyboard problem solved
        I have an inexpensive bluetooth keyboard that works fine with another tablet (Blackberry Playbook), but I could not get it to work with Nook HD. It would pair fine, but nothing happened when keys are hit. I see others complaining of this too. Finally I solved the problem with an app called BlueInput (available on Play Store). It now does the pairing, not Nook OS, and you select the bluetooth keyboard using 'Switch Keyboard' icon.

(update) -- Fix for adding web link icons to the home page
        Some browsers have the option to add a bookmark to Home, but this never seemed to work in Nook HD. I think I now understand the source of the problem. The default Nook HD launcher (with carousel) ignores them. The work around is to install the Nova launcher, and it will show them on the home screens.

---------------------
       While the Nook HD OS is android 4.x and it has access to the full range of android apps, its interface is not pure android. It is apparently missing a range of user control windows and OS controls that I see demoed on other android tablet on YouTube. The limitations that I find most annoying on Nook HD is that there is no way to backup, no way to shut down apps (you reenter where you exited), the only way to get back to the Nook home screen(s) is by pushing the Home button. It takes a lot of taps and pushes to start a new application cleanly.

B&N lies
        Lie: 'Nook battery life is 10 hours.'   Far from it, with screen at max intensity I get only 4 hours (100% to shutdown)

        Poor battery life is probably the worst hardware problem with this tablet. Battery life stinks, you need to keep it all the time on the charger and then in normal browser usage (WiFi on and max screen intensity) you only 4 hours. 10 hours is a flat out lie, and I read that B&N has been caught several times flat out lying about the specs of their products. Nook HD battery has only 75% the mah rating of the BB playbook. While I haven't run a controlled experiment, letting Nook HD set with only WiFi on appears to discharge the battery substantially in 8 hours, much more than BB playbook in a side by side test.

        Lie: 'Nook HD won't charge on USB'.   Not true, overnight on USB will charge battery to 100%

        Lie: 'To reset press on/off button for 20 sec.  Too long and no need to count. You just need to press the on/off button
                     until the screen goes dark (about 8 sec), then release and press again for a couple of seconds to power up.

Browser tests
        Firefox is probably the best browser with several features that are hard to come by. HD video looks great in Firefox. An inline HD video in Firefox plays in HD not in SD as with many other browsers. Firefox will load a desktop site. It does not switch uncontrollably to the mobile site as many browsers do. Test case: Washingon Post.  Homepages are hard to come by in Android browsers, but Tint browser has one.

        I use a custom HTML file in memory as a preferred bookmark (or if possible browser home page). Works in most browsers, but not in Chrome (or Chrome beta), which, while it can load a file from memory refuses to do so from a bookmark. However online I came across a workaround for this and while somewhat cludgy it does works: hold the local homepage icon to bring up a menu, select 'open in a tab'.  Chrome, the default Nook HD browser, has another problem, it does not handle pdf files well.

June 2013 Nook HD purchase
        When at Coop I saw price had been reduced (so-called father's day sale) from 199 to 129, and I was told that it has recently been opened up into a general purpose android tablet (confirmed online), I ordered a white one direct from Barnes and Noble on Sun. (Amazon had only the dark color for 129.) Arrived on Tues! Two months on and the price has stayed at 129, and it may even drift lower as B&N have recently announced they plan to stop production of the Nook HD and Nook HD+ and to only keep their B&W reader tablets and shift their manufacturering.

Early Nook HD  email to friends (6/24/13)

        I am now quite familiar with Nook HD and like it (took it Maine), but it has taken quite a while to set up. Android philosophy is to not shut down apps, but to put them to sleep and reenter at exit point, vs Blackbery where with a swipe I can shut anything down. I find the Android approach frustrating sometimes in that I can't start an app cleanly, and I miss the powerful BB sweeps. Too much pushing of the back button with Android.
        Found three good browsers for the Nook: Chrome, Firfox, Opera. All are scaled down mobile versions, but work well. None have homepage, but I have found a work around. However, none is as full featured as my Blackberry browser, which reliably plays flash. Ran a comparison test playing a new YouTube video (Ogunquit's production of 'Thoughly Modern Mille', which I just saw). BB plays it fine in HD, but Nook will only play it in SD (both inside browser and in YouTube app), which is a waste of its hardware and gorgeous hires screen.
        However, I like that with a real, cheap, 99% ad free, android tablet I now have access to major apps like Google Earth and Skype not available for the the BB tablet.
---------------------------------------
Nook HD browser overview (7/2/13)
        I have had my Nook HD for 2-3 weeks now and have spent many hours playing with it (including taking it on a trip to ME). Much of this time has been trying the many browsers available for it. I have yet to find the perfect browser, they have different weaknesses and strengths.

Reference tablet browser
        What I have slowly come to realize is how good the (built-in) browser of BB playbook is (now more than 1.5 years older). With a couple of minor quibbles, Playbook's browser is just plain better than every one of the Android browsers! Meaing what?

        -- Has a homepage (which it can pull from memory)
        -- Runs full screen
        -- Plays inline video (flash?) nearly always, and can play HD video. (NYT 'slide shows' work too)
        -- Does not (uncontrollably) switch to scaled down 'mobile' version of sites!
        -- Generally well behaved, scrolls well, pages finger expand, screens look good
        -- It can save a bookmark to homepage, so with one tap the browser will start and open this page. (This is especially useful when traveling as you can add (temp) homepage icons to quickly check local weather and radar.)

In other words the BB Playbook browser just runs well and pretty much like my favorite desktop browser (Opera).

        I do see where a couple of newer Android optimized browser have a small edge over the BB browser when it come to playing video. This is the playing of HD video. In two android browsers that can play video in HD (Firefox and Chrome beta), they do so automatically. In the playbook BB HD resolution must be selected, same as with a desktop browser playing YouTube. For a Youtube video this means tapping the resolution gear (not easy as on a tablet as it is tiny), selecting highest resolution, and then waiting for it to switch over to HD, which it can take its own sweet time to do.

My browser tests
        My assumption here is that Adobe Reader is installed and YouTube app is installed that is capable of playing HD video.

Content related:
         Can it load a large image?
                  Yes, all pass
         Can it download a .pdf file and pass it to Adobe Reader
                    Amazingly most android browsers reacted poorly when presented with a .pdf files link,
                            only one browser (Opera) was able to download a .pdf file and call Adobe Reader to view it.
         Can it play inline videos?
                    Varies a lot
         Can it play inline (youtube) videos in Hd by (using YouTube app as a plug-in)?
                    Only two browsers (Chrome beta and Firefox) can play inline YouTube videos in HD
         Does it access only the mobile versions of some sites?
         Does it have a homepage?   Homepage icon?
                I found only two android browsers have a homepage (rare Tint and one version of Opera)
         If no homepage, does it have a work-around that will load an HTML homepage file from memory?
                Opera and Firefox will place homepage links on screen if all tabs closed. Chrome(s) put links
                     on opening screen too, but not suitable for homepage as it doesn't work for memory link.
         Can it save a bookmark to the Nook home screen?
                Not that I have found, serious lack. (Tint says it does, but I never find the icon.)

Video doesn't look good on most android browsers
        A major weakness of most android browsers is no HD video. This is a big deal. Once you see video in HD on a 7" tablet like Nook HD, you can barely stand to watch fuzzy SD video. At present only android browsers that (I find) that can play video in HD are Firefox and Chrome beta. The (baseline) Chrome, Opera, Opera beta, and Tint browser are all missing HD video, they play HD videos in SD.

Homepage
        I have a custom HTML file that I have long used as my browser homepage. This is a short file that I wrote years ago and keep updated with my favorite HTML editor (Netscape composer). It has all my frequently visited links, along with comments and passwords. All my browsers on my desktop use the same homepage file.

        This is how I live online, so it is a big deal, when a browser is missing a homepage. I want a browser on start up (and if possible opening a new tab) to pull this file from memory and display it. All my desktop browsers (Opera, Chrome, Firefox IE, Safari) are set to start this way, though not all of them will pull it when opening a new tab.

        The bad news is that in slimming down the browsers for Android most have lost their homepage. There are a couple of exceptions. I have the obscure 'Tint' browser on my homepage because I found it has a homepage, and one version of Opera (there are three Opera browsers for Nook!) I think had it too. But the three big, generally best all around android browsers (Chrome beta, Firefox and Opera), don't have a homepage.

Setting homepage
        Since it is never obvious how to get a browser to open an html file in memory. The best procedure I have found is to find the file with a file explorer app, then tap on the file to open it. A requester box will pop up asking what browser you want to open the file with. With the file loaded, either set the current file as the homepage, or bookmark it to the opening screen.

        Another difficulty in setting up the homepage on scaled down browsers is font size. Most android browsers have limited font size options, others have none (or nearly none). The fix I found works here is to scale the font size on my desktop, I made several versions and kept only the one that looked best.

Homepage work arounds
        Most android browsers provide some sort of work around for no homepage. This is generally a way of bookmarking large page icons when no tabs are open. Not nearly as clean as a real homepage, but better than nothing, because to see get to these icons all the open tabs must be first closed (one by one).

        Tint                        homepage icon
        Opera                     work around (bizarrely called 'Speed dial')
        Opera                     work around (same as Opera)
        Firefox                   work around (closing open tabs tricky)
        Chrome beta           no effective work around. It does have work around icons on opening screen, but a link there to a file in memory doesn't work. (Cludgy workaround: hold icon to local html file to get menu, select open in new tab)

Mobile sites
        An insideous problem with a lot of the Android browsers is that they apparently identify themselves as 'mobile' and somehow the URL switches to the scaled down mobile site. This is what happens with YouTube video. You can input 'youtube.com', and you will see in many browsers the URL switches to 'm.youtube.com', which is the mobile site and only streams low resolution video (originally intended for phones with small screen on low BW channels) that is inappropriate for tablets on high BW WiFi.

        Today I just noticed the same thing happening with Washington Post newspaper. Running a test.

            Chrome beta           mobile (m.washingtonpost.com)
            Opera                     mobile (m.washingtonpost.com)
            Opera beta              mobile (m.washingtonpost.com)
            FireFox                  newspaper format
            Tint                        newspaper format

Firefox has an option 'request desktop site', but it seems to do this automatically

Tint browser
        Tint has a homepage and some other nice features. It is from 'Anasthase' (https://github.com/anasthase), who I never heard of. They have another browser 'Zirco' (with a strange out of focus icon), so I downloaded this too. Zirco also has a homepage, but I don't see a homepage icon. Tint may be the new version of Ziro. Tint is dated Jan 2013 with 10k downloads. Zirco is dated May 2012 with 50k downloads. I see Zirco listed as "open source" and there are other variants by others available, including one from Univ of Waterloo which apparently feeds back what you browse (!), one month old with 10 downloads.

Twinkle Toes Engineering test
        Loading my .pdf paper crashes Zirco!
        Tint doesn't crash, but fails to open the .pdf paper either (tells me Adobe Reader has stopped working)
        Opera opens file, though it takes a couple of steps.  (Downloads file, then I can select Adobe Reader
                     and it handles the document well
        Firefox opens .pdf file directly in what seems like its own pdf reader, but unfortunately the pdf reader
                     seems overwhelmed by this four page, two column file.
        Chrome beta fails to open .pdf file. It immediately brings up reqestor box, but when I select Adobe Reader,
                     it tells me Adobe reader has stopped working.

Yikes, out of five browsers only Opera will properly open my .pdf paper!

Inline video test
WP Egypt news video
            Tint                        plays OK
            Firefox                   nope (hangs on WP logo)
---------------------------------------
Resolution test
       I started out skeptical from my long experience with Playbook, which at 1,024 x 600 looks very sharp to me, that higher resolution was worth much, but playing with Nook HD+ in a store for a few minutes I found the display pretty sweet. Sure such high resolution may not often do much, but it has a suble attractiveness. You just like it. In the store I stared hard at an image in my Awake and Sing III essay of Seymour and the large plant from Little Shop of Horrors (1,426 x 1,110 pixels) I had downloaded from my site to the HD+ browser, and the image showed great detail. When I got home, I downloaded the same image to my admittedly smaller screen Playbook and it was not as sharp. To check the effect of screen size I a couple of days later I called up the same image on my 42" 1,080 HDTV. On the TV the detail of the image is pretty much like the Playbook, so my memory is telling me the Nook HD+ screen (1,920 x 1,280) was showing more detail in the image than I have seen before.

Are Nooks real tablet computers?
        Quick look says it has a good browser, but it had an annoying habit when scrolling of showing blocks of blurred text, which a second or two later snap into focus, but when I checked Playbook, I see when it lags it just shows a checkerboard white screen until it can catch up. A nice feature is that it takes a micoSD memory card, which nicely fits inside, so for $20 memory can be expanded by 32 Gbytes.

        However, I later learned it was not until May 2013 or so when Nook was not selling well that B&N not only drastically lowered its price, but also opened it up to be a real computer (without rooting) by providing access to the Google play store with 700,000 (claimed) aps.

Nook HD Comparison to Blackberry Playbook
Nook con
        -- missing camera(s) and GPS (which on BB is pretty useless)
        -- sound  is not as good as BB, speakers on back (close together) and max vol is less (no vol off button)
        -- Android must be set up with more basic tooks (browsers, music, video players, etc) (which is time consuming)
        -- Screen capture on Nook (Home + Vol-) buttons is a bitch. I first though it was unusable, but with practice it
                can work. But since one button is on side and one on front, need high pressure and must be pushed simultaneously,
                your hands have to be position just so to have any chance of the capture working. With practice I can now use it,
                but still after a few captures I get a failure. Caputure in BB playbook works much better because the buttons
                (vol+ + vol-) are side by side and both easily press by a side squeeze.
        -- Android O, at least as implemented in the Nook HD, lacks the elegance and control of BB OS

Android OS
        BB has standard swipes that switch between applications and can close any applications. Android is missing this and relies on an OS back arrow (sometime missing!) and a home hardware button. This has a clumsy cludgy feel. Also the Android home page is a clumsy and has a finite app limit. Five screens side by side with half the center screen not usable due to a carosel vs a singel scrolling home page for BB. Moving icons between screens is a bitch. Work around for this is launchers, but it means more button pushing to get home.

        The Android philosophy is not to close apps, but to put them to sleep (developer guidelines are to remove exit commands!) Because of this, when an app is opened, it almost always starts at the last exit point. This has drawbacks, no way to restart clean, need to back up (with back arrow), which can be very slow. When the back arrow is missing, you get trapped. A classic example is the 100+ page Nook .pdf user guide. It has no OS back arrow. I exited one time near the end, so every time I start it that's where I am. How the hell do I get to the beginning to see the table of contents, without flippling a 100 pages. Darned if I know! Also when apps crash, this tends to lock up the machine until it is sensed by OS and a close requester box comes up. And audio apps (radio and music) is not shut down in the app continue to play and there is no OS support to shut them up. Either the app needs to be reopened or the Nook reset.

        -- BB browser is much more sophisticated than any of the Nook/Android browsers. BB has home page, font control, cookie control and cleanly supports flash. I find sometimes in Nook browsers flash will play and often not. I have never gotten flash (YouTube) to play in HD in Nook (plays in HD in a few browsers like Firefox), but it plays HD fine in BB browser.

Nook Pro
        -- sharper screen
        -- more sensitive WiFi (maybe)
        -- faster and scrolls better
        -- voice recognition that really works is standard
                    (available on Google app and built into search on Chrome)
        -- slot for microcard (up to 64 Gb). Card is fully inside the body, but opening the little slot to gain access is not easy.
                   This is not a card you want to change regularly as it takes tools.
        -- has many big applications not available on BB
                    Google earth
                    Skype
                    Solitaire (really good implementation)
                    Mulitple browsers (Opera, Chrome, Chrome beta, Firefox)
                            -- All the browsers are simplified mobile versions with no homepage ! (I found workarounds for this in most browsers)
                            -- Embedded Flash is tricky (see below)

Home
        To exit a program and get back to home screen
                a) push 'home' button  (if there are launcher apps, you then need to also tap Home)
                b) I read in earlier Nooks there was a swipe way to get to home (swipe left from lower left corner) or
                    (double swipe: out and back starting from lower left corner), but neither works on Nook HD

Trap!
        Damn. I went into 'Your Nook Today' (to see weather) and there is no way out!! Above lower left corner swipe doesn't work. No back arrow key, and worst pushing home buttom, Home bring you back to where you started from. Found the trick, really stupid!! To exit hit the 'Your Nook Today' circle again, even though it half covered. Ridiculous!

YouTube video in HD
        With the georgeous Nook screen you want to see videos play in HD. Initially YouTube video would only play in SD (or not play at all). Then after playing around for couple of days and doing a lot of fruitless searching, I downloaded the YouTube app and that was the key. If a video is available in HD, it defaults to HD when it plays.  I actually found the app on the Android site (http://osandroid.com), which indentified apps that meet Nook HD specs, and downloaded it from there. I later found it was in the Play store too.

        My test video for HD testing was Ogunquit Playhouse's promo video for their 2013 summer show 'Thoroughly Modern Mille' (which I just saw). (http://www.youtube.com/watch?v=zIxOXfNeCmg) It looks dramatically sharper on the 7" Nook screen in HD than in SD. I find the right tablet browser (like Firefox) has have the edge over desktop browsers for playing HD youtube videos. In a desktop browser to get HD you need to click (nearly always) the gear icon and select high resolution, and then I find it takes its own sweet time to change to the newly selected resolution. In Nook HD with firefox the same video just plays in HD (nothing to select).

        On my Blackberry Playbook Youtube has always looked like desktop YouTube. There is the resolution selector and if HD is selected it plays in HD. And it's a kind of a bitch selecting the icon gear as it is tiny on a 7" tablet. On Android it is different, simplified, essentially HD is either on or off. In off HD is greyed out or it shows HQ (whatever that means).

        I now see why Youtube will not play in Opera or Chrome in HD. The YouTube URL on my homepage is (http://www.youtube.com/), but when I watch the address bar in Opera I see the URL changes to (m.youtube.com). (m.youtube.com) is the mobile YouTube site and does not support HD resolution!  Before I installed the YouTube app, Firefox would not play inline YouTube videos at all because it was looking for a plug-in it couldn't find.

**    With more tests I think I see what's going on. The YouTube app I downloaded from Google play store, unlike other apps I downloaded, cannot be uninstalled. This makes sense if it has been incorporated into the OS. I suspect newer Android browsers (FireFox and Chrome beta) are calling the Youtube app, using it like a plug-in. (In fact this is the only difference I see between pre-installed Chrome and its beta version.)  So HD video is a work in progress on Android, updated Android browsers play inline YouTube video in HD now and the others will at some point in the future when they get updated. For YouTube videos a clean way to view in HD is just the YouTube app.

        Some articles say flash is dying, only needed for files with xxx, and it is being replaced by HTML5, so whether HD Youtube is flash or HTML5 I don't know.

Bottom line --- To view inline Youtube videos in HD use Chrome beta or Firefox, or directly use the YouTube app.

Negative hardware
        No micro USB port, but a cable that adapts the propriety 30 pin port to USB is provided. The 30 pin connector also support HDMI to a TV, but this cable must be purchased.
        No camera and no GPS
        Speakers on back. (Curiously HD has two speaker grills on either side, but HD+ has just one. I saw a claim that on HD+ there are two speakers behind the same grill, but does that any sense?)

Negative software
        Html is not shown as a supported file type
        Is there a video player to play stored video?

External Nook memory card
        Looks like the card to buy is 32k microSDHC card, class 4 or 6 (though reviews say SanDisk class 4 works fine). These tiny cards (1/2 in x 1/2 in) are often called mobile cards because they are used in phones. Read speeds seems very fast (30 Mbyte/sec), reviewer say movies play fine from a class 4 card. Nook can take up to a 64 Gb card, but 64 Gb card is expensive and is (preformatted) in new exFat rather than FAT32, so Nook warns that some apps will not be able to use it. The card opening is on the bottom (not corner), and I have yet to get it open using only my fingernails, needs a small screwdriver.
Manual says
                microSDHC is supported to 32 Gbyes (class 6 is suggested) (Fat32 up to 32 Gb)  (HC means 'high capacity')
                                      However, N2Acards, who sell a dual boot system specify only class 4 Sandisk for Nood HD
                microSDXC is supported to 64 Gbytes This card uses (newer) exFat files system, which breaks the 4 Gb max file size limit.
                             UHS speed is not supported in this card.  (XC means 'extended capacity')

Formatting
        Manual formatting info is complex and a little confusing.
                Nook support Fat 32 and exFat file formats
                Fat32 has max 4 Gbyte file size limit
                Nook format command will not format to Fat32, but to exFat (on microSDHC?)
                         While exFat removes the 4 Gbyte file limit and can be read by native Nook apps, outside apps may require
                                 Fat32 file format. The manual is not very clear, but the exFat is only mentioned with respect to microSDXC card.
Formatting info from SanDisk
        All their cards are preformatted (from Sandisk Q&A, amazingly this is not mentioned in specs), Fat32 (4 to 32 Gbyte cards)
                            64 Gbyte cards are preformatted with exFat (extended FAT). Window 7 support exFAT
        Cards can be FAT32 formatted using a PC (wipes card)

Bottom line: buy a 16 Gb ($10) or 32 Gb ($20) microSDHC class 4 or 6 or 10 card, preformatted with Fat32. Some cards come with adaptors and some don't. I need an adaptor (about $3 more), so the card can be loaded from PC.

        http://www.amazon.com/SanDisk-microSDHC-Memory-SDSDQM-032G-B35-Packaging/dp/B004G60AD6/ref=pd_cp_pc_3

        Good card reference. Shows that you open a little door on bottom to left of input connector that you open with fingernail, slip in card and close door. (on older Nook the card slot was in corner)
         http://www.dummies.com/how-to/content/install-and-format-the-memory-card-in-a-nook-table.html

        I bought a 16 Gbyte class 4 card from San Disk (11 with adaptor), but found all attempts to write to it with desktop failed as it reported write protected. However, when I inserted it in Nook HD, I had no trouble writing to it. Video's in native foramat (mp4) play from it pretty well, but I see the occasional frame drop, that I don't remember seeing in BB playbook playing the same file. My one test with an app to play video in non-native format, was jumpy and unwatchable.

Open android tablet
        A real weakness in the Nook HD until recently was no 3rd party apps (without complex rooting) only applications from B&N, which offered very few. In May 2013 B&N made a big change elimating 99.9% of the restrictions by providing access to 'Google Play'. Consensus is this makes the Nook HD "comparable to any android tablet". Well maybe, but demos of Android tablet seem to show home page lists of running apps and with swipes to shut them down. This has not been implement in Nook, so I have yet to find a clean way to shut down apps, usually I just push Nook button to go back to home and they go to sleep.

Skype?
        Maybe, confusion. (Of course no skype video calls because Nook has no camera)
            --  "Skype would be nice because the NOOK HD comes with a mic, but as far as I know Skype will not be accessible."
            -- Got skype installed and it partially works, but cannot find microphone, which he tested with another app (voice notes?) verifying the microphone works
            -- another authentic looking tweet says, "The application Skype is compatible with Barnes & Nooble NOOK HD on the system requirements" (http://osandroid.com/en/phone/barnes-nooble-nook-hd/soft/23-skype.html)
        -- Have not yet tried it, but Skype is in Play store and it downloads and installs in Nook.

Unboxing (as they say in videos) (6/18/13)
        Arrives uncharged. 30 pin to USB cable doubles as power cable as USB plugs into wall socket adaptor. Manuals says it takes 3 hr to charge, Q&A says it takes 4-5 hr! and it cannot be charged from computer. Looks to me like it charges in about an hour. Connected to WiFi easily and has loaded and installed updates. I need to register with B&N. Setup account with B&N using my standard Mastercard.

         Seems very WiFi sensitive. Detects 'good' signal strength (3-4 bars) for three neighbors.

        Quickly set up my Comcast email. (Later I just entered my Hotmail address and that was all it needed to set up that account.) Email accounts can be viewed separately or combined. A chime notification can be set to ring when an email comes in.

        5.51 Gybes (of 8) available (initially) Downloaded programs don't take much space. I bet 50 - 100 apps will fit in 1 Gb of my available 5 Gb. The largest apps run 30 Mb or so, many are only a few Mb.

        Android 4.x (code name Jelly Bean) somewhat modified is the Nook OS

PDF files
       Download of pdf (my paper) from my home page failed!  Downloaded Adobe (free) from Google play. When I click now on pdf on my page is says Adobe stopped working!! (Later it just straightened itself out and pdf files now work OK.)

        Files can be viewed via USB, but doesn't seem to be anyway to make new directories. 'New' is missing (on right click), but directories can be deleted.
        Can't figure out how to open card door. (don't want to break it) not sure how it flips
        There are apps for WiFi file access on PC, but unlike BB, it's a pain to use, because the app must be running (reset shuts it off) for WiFi access to work on PC.

Screen capture
         Push [home + vol -] at same time. Works, but the two buttons are stiff and need to be pushed at exactly the same time, which is very difficult, even the slightest timing difference causes the first keypress to be sensed, so often find yourself at home. (When it works, you get a reduced image on the screen for a second.) It is so difficult that I don't see it as being very useful. In the BB the [vol + + vol-] simultaneous push is much easier and more easily repeated, and over the last year I have used it a lot.

Browser switch
       When my Nook HD was brand new it powered up with its old browser. I used it for 30 min. It had a homepage, which I set to my homepage, and a document mode. Then Nook started doing more upgrading, and poof it was gone, and it told me Chrome was the (new) browser.  (And apparently the old Nook HD browser is long gone since it is mourned by posters and not available as an app either.) I read this was part of the deal between B&N and Google. To get access to the Google play store of android apps, Google required that their broswer, Chrome, be the defaul browser on Nook HD.

Chrome Browser issues
    Nook browser before chrome had a homepage!
        No home page icon on Chrome header!
        How to open another page? Hitting + in right hand corner makes a copy of existing page in new tab.
         As a viewer noted help seems to be written for another version of Chome. for example it says voice search works only for Ios, but it works on my Nook HD!! (neat feature, can save a lot of typing. However hybird came out hi bird)
         Chrome has a web store with small programs that add features. Tried it and it says my system not supported "yet". Nook says its Chrome doesn't support plug-in's.
-----------------------------------
        Suddenly went into update mode for applications, telling me my browser was just updated to Chrome.
        Don't see how to set any homepage in Chrome (can't)
        Don't see how to go full screen (in older browser I could do this by dragging)
        Can say browser command like homepage! (tap microphone top right and just speak). Works, mic works.
Found a long rant that Chrome sucks   --- one of problems listed is no homepage, however a by holding a bookmark it can be put as a shortcut on homepage. Did this, now if I can find home page.

        Later I downloaded my usual html homepage file, and in a file manager clicked on it. It asks what browser to open. I then make it a book mark, or in the case of Opea add it to 'speed dial'. Because most of the Android browsers have no font size control, I made several versions of the file withh different fonts (on PC) and tried them on Nook. I now have a quasi homepage in Opera and Firefox, but Android won't load even though it shows a shortcut.

        Found a link to 'Chrome beta' for android on google play which supports fullscren on ipad, so I downloaded it.
Try this. by signing into Chrome it offers to bring in data from desktop, this might include homepage. I now have Chrome and Chrome beta. Very similar, by sliding up screen I can go full screen on Chrome beta.

        Opera works full screen and it downloads and opens (via Adobe) pdf files, which never worked in chrome. putting navigation bar at bottom brings up a real full screen button. Don't see any homepage or way to open local file.

Music
         MP3 play, but .wma are not (natively) supported. Google music player (free) apps can be found that will play .wma files. (Some of first songs added, Book of mormon score, are a mixture of .wma and .mp3.)

        Music and radio players on this android machine have a very annoying problem. Because there is no obvious way to shut down windows in android (I read this is specifically their philosophy), almost every music player and radio player I test continues to play when you exit. The only way I find to shut off the sound is to reset the machine, which is absurd.

Nook HD On/Off
       Normally the power button puts Nook to sleep and either the power button or nook button will wake it up. Like BB playbook the Nook HD WiFi is working. Nook while 'asleep' will chime when an email arrrives. The BB playbook can be talked to via WiFi from desktop computer while its asleep, so asleep seems to mean the screen is dark (and maybe apps are suspended). I downloaded an app which allows the screen to be turned off by a tap to the screen to the app's notification (top, center) icon.

Nook HD Soft reset
        To do a soft reset (all files intact) hold the power button for 10-20 sec, then push and hold the power button for 2 sec to restart. The initialization time is about 45 sec to 1 min (far faster than the BB Playbook).

Battery
        4,050 mah  (vs 5,400 mah battery in BB Playbook)

Processor
        Dual-Core 1.3GHz TI OMAP 4470 (Texas Instruments)

ARM processors
       An interesting article by a tech writer (July 2013) explained the market for processors in mobile devices (phones and tablets) is dominated (hugely dominated 90% penetration!) by a medium size company in UK called ARM. They remain almost unknown because they don't build chips, they design the processors. Their processors that are optimized for low power battery operation (many zones that can be independently powered up and down). The reason ARM remains virtually unknown is because they sell their designs to everyone (TI, Apple, etc), who can add may to them and who sell them under their own name. And since all major semiconductor houses are selling similar ARM processor designs, the competition is intense so the chips sell pretty much for cost.

        Sure enough, I dug out the data sheet for a TI OMAP processor (TI OMAP 3503, 720 Mhz, not the one above), and it turns out to be an ARM design. The data sheet starts off that is is the TI OMAP architecture, but then you find it has an ARM core and is compatible with the ARM instruction set.

        This class of mobile device chips is phenominal. The one I looked up comes in a 515 pin package (grid of 515 balls on bottom!) with subsystems for everything a tablet or phone might have. Core runs at about 1.2V and nominal chip power is a tiny 1W!  (In contrast a desktop CPU chip might run 35+ watts.

Operating system
        Android 4.0

Video format supported
        .mp4
----------------------------------
Size and screen resolution
        HD                           7" screen (5.926" x 3.70"),   1,440 x 900,      243 pixels/inch
                                         7.65" (194.4 mm) x 5.00" (127.1 mm) x 0.43" (11.0 mm)
                                         11.1 oz (315 g)   vs  (15 oz for BB Playbook)

       Google Nexus 7 by Asus
                                        7" screen (5.926" x 3.70"),   1,920 x 1,200      323 pixels/inch
                                         7.87" (200 mm) x 4.49" (114 mm) x 0.34" (8.65 mm)
                                         10.24 oz (290 g)   vs  (11.1 oz for Nook HD)

        HD+                        9" screen (7.5" x 5.0"),       1,920 x 1,280,     256 pixels/inch
                                         9.46" (240.3 mm) x 6.41" (162.8 mm) x 0.45" (11.4 mm)
                                         18.2 oz  (515 g)

        Ipad3                        9.7" screen (7.76" x 5.82"),        2,048 x 1,536,   264 pixels/inch
                                         9.50" (241.2 mm) x 7.31" (185.7 mm) x 0.37" (9.4 mm)
                                         23.0 oz  (652 g)

Nook HD comparison to 2013 Google Nexus 7  by Asus to Kindle Fire HD
        In July 2013 Google announced a new version of its Nexus 7, billing it as the world's highest resolution tablet [pixel/in higher x1.33]. It's an Android tablet (ver 4.3, Jellybean), a little lighter and thinner than Nook HD with a faster processor. Like Nook HD it has a custom connector (that does USB and HDMI), bluetooth, stereo speakers (on back), microphone and headphone jack. It doens't appear to have anything equivalent to the 'Nook button', which is Nook's main homescreen button. Nexus 7 has two cameras (5 MP and 1.MP) that the Nook is missing, but Nexus 7 doesn't have the memory expansion slot the nook has. Whether Nexus has GPS is murky. I didn't see it in the Asus specs, but users think the hardware is in there but not working (yet). Again the claim is ten hour battery life, but the Nexus 7 has about the same size battery (actually 2.5% smaller, 3,950 vs 4,050 mah) as the Nook HD, so I am skeptical it's battery life will be any better, especially with more pixels to push around. One technical user reports 5.5 hr of battery life.

        Cost for new Next 7 is 229 (16 Gb) and 269 (32 Gb). With its discontinuance an 8 Gb Nook HD can now be bought for 110 (ten dollars more will buy a 16 Gb card to put in it). Kindle Fire HD with super high res display is 180 for 16 Gbyte, lower screen resolution 7" Kindle Fire HD 7 is 159 for 16 Byte. However, reading the reviews (4/15) of the Amazon Fire HD 7 I find it is infected with adds, apps very restricted, only available from Amazon store, no access to google Play Store, only one browser allowed (Silk), no (google) YouTube. Older Fire HD model, very similar except dual processor, heavier 13.9 oz, with same 1,280 x 800 screen available used for much less than 100 (60-70). A used tablet might be a good idea.
 

 
Google
2013 Asus Nexus 7
Nook HD
Samsung Galaxy Tab 4
 Kindle Fire HD 7
Apple mini-pad
7" screen
323 pixels/in
1,920 × 1,200
243 pixels/in
1,440 x 900
216 pixels/in
1,280 x 800
216 pixels/in
1,280 x 800

(720 HD video playback)

326 pixels/in
2,048 x 1,536
(retina)
ram
2 Gb
1 Gb
1.5 Gb
 1 Gb
1 Gb
cpu
quad core, 1.5Ghz
Qualcomm
snapdragon
dual core, 1.3Ghz
TI Omap
quad-core
1.2 GHz  Qualcomm
(snapdraggon?)
quad core,
1.5/1.2 Ghz
1.3 Ghz
3DMark
CPU speed benchmark
6,100 (user)
3,940
     
battery
3,950 mah
(about 15 wh)
4,050 mah
4,000 mah
   
cameras
5 Mpixel
1.5 Mpixel
none
3 Mpixel
1.3 Mpixel
2 Mpixel rear
1080p hd video
front (VGA quality)
 5 Mpixel (rear)
memory card slot
no
yes
yes
no
no
speakers
stereo on back
stereo on back
mono
 yes
 
(real) GPS
in WiFi
yes
no
GPS with GLONASS
 no
no
ports
 USB micro port
(works with flash and hard drives) 
USB micro
(sort of)
USB micro port
(no support for flash drives)
 USB 2 micro (sort of)
 
bluetooth
 yes
 yes
yes
 yes
 
OS
 (pure) android
4.3 or 4.4 kit kat
android
(custom)
android
4.4 kit kat
(with Samsung overlay)
android
(custom)?
Apple OS
app store
 Google play store
android
(google Play Store)
google play store
amazon only
(all google apps including YouTube banned)
apple
weight
10.24 oz
11.1 oz
9.7 oz
11.9 oz
(10.6 m thick)
 11.7 oz
price
165
(16 Gb)
110 (8 Gb expandable)
(plus 10 for 16 Gb card)
138 (8 Gb expandable)
Amazon
159
(16 Gb)
'special offers', which means infected with ads! 
300

        Note in table there is a problem with screen spec: resolution vs pixel per square inch. The resolution numbers of the mini-Ipad are quite a bit higher than the (2013) and Fire HD, yet its pixels per inch spec is almost the same. Haven't figured this one out. Maybe the min-Ipad has a larger screen, it is described as a 7.9" not 7", but even assuming a larger screen the numbers are still off by 20%.

Samsung Galaxy Tab 4 vs Google Nexus 7 (May 2015)
        Saw Samsung Galaxy Tab 4 at Staples in NYC, and it looked like it might be a reasonable price upgrade to the Nook HD. I love my 7" Nook and use it 1-2 hours a day for games, but its battery is pretty much drained after 2 hours. Nook style with one front button. Adds options the Nook is missing: two cameras and GPS, so should be able to do navigation (with pre-downloaded maps). Slightly lower screen resolution, but looked fine when I saw it in store, standard android OS, 10% lighter than Nook, same mah battery, but most Amazon users reporting good good battery life. It will record 1080p (or 720?) video. Minor drawbacks: mono speaker.

        I had pretty much decided to buy it, but a couple of Amazon reviewers complain it's slow on games. They say Temple run lags and even Candy Crush is jerky, and these are the games I like. This makes me pause. Looking at the cpu specs it gets down to whether the Qualcomm chip is slower than the TI Omap. One major review thinks it is the Qualcomm Snapdraggon 400, which is what the Google Nexus 7 uses, but Nexus 7 should be 25% faster since 1.5 Ghz vs 1.2 Ghz. PC Magazine review says the Samsung Tab 4 is somewhat slow and their editor's choice is Google Nexus 7 which they say is just better all around. I see its price has come down from 197 to 165 (16 Gb, but not expandable). Reviewer says, movies, music, etc can be dirrectly transferred to Nexus 7 from a flash drive without need for a computer. He says he can even plug his GoPro camera into it (with correct cable) and watch recorded video directly from the camera's SD card, so it seems that the USB port can function as sort of an external storage port. ["You either root (get administrative priveliges) and get StickMount or you get the Nexus Media Importer app (no root required). When you plug in your external media, you either mount via stickmount or use the Nexus Media Importer app to directly stream."] With a 35 Google Chromcast an internet streamed video can be displayed on a TV. Reviewer report it works well in car as a GPS navigator.

        So the choice is whether to pay about 25 more for a faster machine with better cameras, better sound and better screen resolution, but is limited to 16 Gb non expandable vs 8 Gb expandable. Nexus 7 is missing a front button, need to find a side button to wake it up, which some reviewers complain about. One reviewer says the Nexus 7 is pure Android, no custom interface, no bloatware (which the Samsung will have plenty of).  I'm now leaning toward the Google Nexus 7.

Apple mini-Ipad
        My interest in a possible new 7" tablet was triggered by playing with the Apple mini in the big Apple store near the park in Jan 2015. New apps, nice camera and location on Maps. Price turned out to be high (300) for latest Apple mini with retinea display, but my interest in Apple mini was greatly reduced when I found that Apple had compromised the device leaving out the GPS chip from the WiFi model.

Kindle Fire HD
        The obvious key issue with the new super high res Kindle Fire Hd is whether it is a real android tablet or just a purchasing  device for Amazon. I read that you don't have access to the Google PlayStore, only the Amazon playstore, but there is sort of a cludgy work around to get other android apps onto the Kindle Fire. The trick is to use another android tablet to download apps in the standard APK format and copy them over (via PC) to the Fire HD  --- ["The Kindle Fire can install any app in the standard Android APK format."]  In practice this will be a huge hassle that will only be worth doing for a big app once in a while. Sure enough it's a long detailed procedure (below) that makes the .apk file visible by backing it up with ES File Explorer.

Access to android xxx.apk app files
       Briefly the procedure to see and copy the .apk app files is access apps in ES File Explorer, select an app and back it up. On a Pc the app .apk files are found under 'internal storage, backup, apps'. I tried this and it works: Google Earth xxxx.apk file is 7.7 Mbyte. Procedure is detailed here.
So why a new android table?
        I already own a light, hires screen open android tablet in the Nook HD, so if Apple is out why would I want a new android tablet?  First thought is two things the Nook HD is missing: camera(s) and GPS. Doing a little research I find that not only is the Apple mini missing GPS, but the Amazon Kindle Fire HD is missing GPS too! The Kindle Fire HD is further crippled by only having a front (self) camera plus it is not a true open android tablet. On top of that it's not cheap, so I have little interest in Kindle Fire.

        Spoiled by the Nook HD the only other viable candidate at this time for a light  7" tablet with super high resolution screen like the Nook HD is the 2013 Nexus 7 for about 200. However, user after user complains that its cameras don't take good photos, so that a negative. Plus I already own a good camera tablet in my BB Playbook, which even takes 1080 video.

Nook HD crash
       A few months ago (late 2014) I did have a total crash with my Nook HD. It suddenly refused to boot. I changed temp, mechanically stressed it and nothing. Just about ready to toss it I tried pulling out the SD card, and it came alive. However, only option was take it back to factory condition, so all my apps were lost. I had to download and reinstall everything, but it's been several months and it's been OK. I have no freaking idea what happened. The SD card is back in too and working OK.
GPS tablet for car navigation
        I was intrigued when I read some people with tablets having 'real' GPS (GPS that works off satellites without active WiFi) were using them as navigation systems in car (and elsewhere). The Nexus qualifies here. There is a cheaper Acer Ionia  (138, 8 Gb with SD card slot), but it does not have a super hires screen. I like my Garmin navigation system, but it's map function is nearly useless. Of course for a dedicated car tablet navigation system, screen resolution, weight and battery life don't matter, it all comes down to having a good GPS chip and cost!
        ** Acer Iconia site shows the make about a million android models, all with very confusing names. A new 8" 16 Gb (no slot) 1280 x 800 model for 129 has a GPS chip (release date Jan 2015, no reviews yet).
Google maps on Nook HD
        I cranked up google maps on my Nook HD and noticed something interesting. While it doesn't have a GPS chip to provide a location to the map app, its map search can be done by VOICE. If you know the town, just say it and maps will open at the town. It even recognizes places like 'Edison Hotel, New York City and will pull up the NYC map with Edison at the center. Neat.

        This wouldn't work of course if on the road and lost, still voice search replaces a lot of the function of the GPS chip so is a GPS chip really needed?  Voice search commands are not always recognized correctly, but still... For any wifi (only) tablet to work as a navigation system, GPS or no GPS,  maps have to be downloaded (via WiFi) and saved for offline use. I read all google maps for USA take about 1.3 Gb, but I haven't figured out how to do this yet. From the app I find I can download about 60 x 60 miles (80 Mbytes), larger than this and it tells me 'too large, zoom in'.  To call up the downloaded map segments takes a lot of steps: right menu bar, My places, Offline, then tap one of the maps to show the map segments.

Google maps offline is crippled
        I downloaded four (overlapping) map areas in MA and Me and realized I could simulate map use on the road by just shutting down my tablet WiFi. I was in for a shock.  Most of map functions don't work, all the menu icons are down (except the one on the right), no navigation, no directions, no satellite view, no restaurants, hotels, etc, and also the voice commands are down, so to center the map you need to type a town or drag the map. There also seems to be some loss of detail in the maps, but I found I could partially solve this by using smaller, saving smaller (overlapping) map areas. Also ran into a bug (or  what seemed like a bug) that prevented me from renaming the map segments. It's important the segments are clearly named. But after updating the app and reaaccessing the offline maps, I found the new names I put in were accepted.

        No navigation means that you can't offline get the direction feature to draw the route on the map. This works well with WiFi on, but even if the route is save, it can't be accessed without WiFi because it is under the second menu icon (stacked papers, driving directions to xxx) and this icon is down. Note it matters little if your tablet has a GPS chip, Google maps are still crippled. I found a forum discussing this and many users were complaining bitterly that they had bought a new tablet with GPS to use Google maps only to have Google 'update' the maps and cripple the offline functionality. One poster said maps without navigation, 'What's the point'.

=========================================================================================================

Nexus 7, Google (by Asus)
7" android tablet
(June 2015)

Nexus 7 tablet picture upload (12/6/16)
        Upload of pictures from the Nexus 7 to a PC is tricky, a pain really, very difficult to figure out if you don't know the trick. When the tablet is plugged into a USB port it shows up in Explorer as 'Nexus 7', but when clicked nothing happens, no files or directories show. Why not!

        A method that works is to (manually) set up an ftp link between the tablet and the PC. Enter into a browser (use Chrome or new Opera) address line ftp://192.168.0.100:8888  (note the colon before 8888). My tablet has already installed an app called 'Software Data Cable' (by Dami) that works over UPS. (On my Nexus 7 it is to be found on the first left home screen under a UPS icon next to battery icon). Click on this icon, then 'Computer' which will show the same ftp address as was manually entered into the PC. At the bottom left click 'Start Service', then bottom right click 'Connect Now'. At this point the link should be active, so the browser should show the Nexus 7 files, which are to be found in the directory 'Camera (device storage). File sort should work allowing the latest files to be found, uploaded and saved to the PC's hard drive.
---------------------------------
        Both of  my existing 7" tablets, Blackberry Playbook and and Nook HD, are obsolete, so recently bought a 7" tablet: Nexus 7, Google (by Asus) (165 for 16 Gb, Amazon). This tablet was introduced two years ago (July 2013), and since its price has come down from 230 to 165. A lot like Nook except retina display (323 pixel/inch) and with the extras Nook is missing like GPS, two cameras, better sound, plus faster processor, 10% lighter, 1/2" narrower. What allows it to be narrower is that there is virtually no plastic bezel on the front, vs Nook which has a half inch front bezel all around. Unfortunately this makes holding the Nexus 7 tablet with one hand difficult as the glass is slippery. Also the lack of a front 'home' button on the Nexus 7 (vs Nook) is a drawback, an opinion I see shared in many Amazon reviews. The Nexus 7 when off is totally black and featureless, so it takes some fumbling to find the off/sleep button.

        Nexus 7 has a single standard microUSB port that does multiple jobs: power, connects to computer to allow memory to be loaded, and with adapter cable functions as a standard USB port (except no power), so a flash drive or even a hard drive can be plugged in and should be accessible (haven't tried this yet as the cable as not arrived). This feature is known as 'USB On the Go'. (update: I read online that this feature worked with Android 4.4 (KitKat), which is the OS advertised for Nexus 7, but on first power up it upgraded its OS to android 5.1.1 (Lollipop).  I read online that USB On the Go does not work with this new version of android, and USB test utilities seem to confirm this.)

        Nexus 7 supports Qi wireless charging.

        I don't have a smart phone so I no experience with navigation systems except in my car. [BB has GPS, but it's not well supported by apps.] I downloaded three GPS apps: 'GPS test' and 'MapFactor: GPS Navigator', which works with OpenStreetMaps (www.openstreetmaps.org), and OpenStreetMaps for three states. Checked them out walking around neighbourhood, and it was a hoot. GPS Navigator was showing my location accurately on the (nice) OpenStreeMaps, and GPS test was telling me accurate to 10 feet on map using 11 satellites. This summer I will probably try it in my car as a 2nd navigation system.

        So far I see almost no difference in sharpness of the Nexus 7 display over the Nook. For games I prefer the slightly lower color saturation of the Nook and also think the Nook has the edge on touch sensitivity too. There seems to be a few less responsive spots on the Nexus 7, where for example several tries are sometimes required to get some Candy Crush objects to move.

Button commands
        Nexus 7 has three buttons: power/sleep, vol up and vol down (double wide rocker button)

            Screen capture                    Power and Vol down simultaneously (2-3 sec)
            Soft reset (reboot)              Hold power button (10 sec) until 'Google' appears
            Recovery menu                   Hold Power and Vol up (20-30 sec) until Recovery Menu appears
                                                                           Reboot system now is one of several options
            Recovery                            Hold Power and Vol down (20-30 sec) until 'Restart Bootloader' appears
                                                                          use vol up/down to cycle through options (Power to select)

Procedure to clear cache

Press and hold Power and Volume Down buttons simultaneously until you see something other than Google on the screen.
You should see a large arrow at the top of the screen.
Tap Volume Down repeatedly until you see Recovery in the arrow.  Then tap the Power button
You should see an android on his back, chest open with a red triangle and exclamation mark.
While holding Power button tap Volume Up once then release Power.
You should now see a list of items at top of screen.
Tap Volume Down until the item to erase or wipe the cache partition is highlighted.  Then tap Power button to initiate.
Status messages will appear at the bottom of the screen.  Be patient – it can take 10-15 minutes to complete.  When done restart the Nexus.
Nexus 7 (2013) tear down video
               https://www.youtube.com/watch?v=IG6A_RBX-v0
Article on fixing android 5.1.1 problems in Nexus 7
               http://www.gottabemobile.com/2015/05/12/nexus-android-5-1-1-problems-fixes/