The ePub format is an open format designed by the Open eBook Forum and developed by the International Digital Publishing Forum. Examples of software that can open this format are EPUBReader Firefox add-on, Google Play books, Adobe Digital Editions, and QuickReader. Meanwhile, devices that can open this file include the iPhone, iPod Touch, iPad, Sony Readers, Kobo Reader, and the Nook from Barnes & Noble.
This is an Amazon format used exclusively on the Amazon Kindle. It is basically a MOBI format that uses a high compression option. As Kindle apps have been released for devices other than the Kindle reader, AZW format files can also be opened on smartphones (iPhone, Android phones, and BlackBerry), computers (Mac and PCs), and tablets (iPad, Android tablets, and Windows 8 tablets).
This is an e-book format developed for the Microsoft Reader software. It is native to the PocketPC and Windows Mobile devices, and can also be found on PCs and the Hanlin eReader. However, content in LIT format was discontinued starting November 2011, while downloading of the Microsoft Reader software was stopped by the end of August 2012. Users may still use the Microsoft Reader on their devices but cannot add new content anymore.
The e-book format used by the MobiPocket Reader, MOBI was originally made as a PalmDOC format’s extension. It can be opened using MobiPocket’s reading software, which can be installed on a lot of PDAs and smartphones. There are limitations of the MOBI format. For example, sizes of images cannot be scaled with the font size; tables display differently on different readers, especially if the table covers more than one screen; and there is an absence of support for nested tables. Third party readers such as Stanza, FBReader, Kindle for PC and Mac, and STDU Viewer can open MOBI files.