APABI is a format devised by Founder Electronics. It is a popular format for Chinese e-books. It can be read using the Apabi Reader software, and produced using Apabi Publisher. Both .xeb and .ceb files are encoded binary files.
https://en.wikipedia.org/wiki/Comparison_of_e-book_formats
IBM created this e-book format and used it extensively for OS/2 and other of its operating systems. The INF files were often digital versions of printed books that came with some bundles of OS/2 and other products.
https://en.wikipedia.org/wiki/Comparison_of_e-book_formats
1 Click on the tab link for “Settings”. 2  Scroll down to where you see “Personal document settings” and you’ll see a list of all your registered Kindle devices and apps, along with a corresponding email that has the word “kindle” in it. 3  You can e-mail personal documents to your device using the e-mail address(es) shown.
http://stevebremner.com/2014/03/how-to-put-non-amazon-e-books-on-your-kindle/
The .azw3 file format supports a subset of HTML5 and CSS3 features, with some additional nonstandard features; the new data is stored within a container which can also be used to store a Mobi content document, allowing limited backwards compatibility. Older Kindle e-readers use the proprietary format, AZW.
https://en.wikipedia.org/wiki/Comparison_of_e-book_formats
Plucker is an Open Source free mobile and desktop e-book reader application with its own associated file format and software to automatically generate Plucker files from text, PDF, HTML, or other document format files, web sites or RSS feeds.
https://en.wikipedia.org/wiki/Comparison_of_e-book_formats
1 Select the title(s) that you want to deliver to your supported Fire tablet, Kindle e-reader, or Kindle reading app, and then select Deliver. 2  To remove selected personal documents from the Manage Your Content and Devices page, select the titles that you want to delete, and then select Delete.
https://www.amazon.com/gp/help/customer/display.html/ref=hp_pdoc_main_short_us?nodeId=200767340
The Amazon Kindle's AZW format is basically just the Mobipocket format with a slightly different serial number scheme (it uses an asterisk instead of a dollar sign), and .prc publications can be read directly on the Kindle.
https://en.wikipedia.org/wiki/Comparison_of_e-book_formats
You can modify your Send to Kindle email address at any time. To modify your Send to Kindle email address: 1  Go to Manage Your Content and Devices. 2  From Settings, scroll down to Personal Document Settings. 3  Under Send to Kindle Email Settings, click Edit next to your Fire tablet, Kindle e-reader, or Kindle reading app.
https://www.amazon.com/gp/help/customer/display.html/ref=hp_pdoc_main_short_us?nodeId=200767340
Transfer Documents Via USB. You can transfer a personal document from your computer to your compatible Fire tablet or Kindle e-reader. To transfer a personal document: 1  Go to Manage Your Content and Devices and locate the folder where your document is housed.
https://www.amazon.com/gp/help/customer/display.html/ref=hp_pdoc_main_short_us?nodeId=200767340
To successfully send personal documents with your Send to Kindle email address: 1  Ensure that the sender's email address has been added to Your Approved Personal Document Email List. 2  Verify that your document is a supported file type. 3  See Supported File Types for Kindle Personal Documents Service.
https://www.amazon.com/gp/help/customer/display.html/ref=hp_pdoc_main_short_us?nodeId=200767340
what kind of files can i add to a kindle
You can add Mobipocket files to a Kindle.