The full name of EPUB is Electronic Publishing. It is the latest popular format of e-books. It can be used in the publishing, editing, production and distribution of e-books. The stored contents are: pictures, text, sounds, charts, etc. EPUB is a ZIP compression format. It can be read by many e-book devices. But Kindle does not support opening EPUB format, the format that Kindle can read is MOBI. If your system is Windows, you can install some readers to open the EPUB format, such as Sigil. There are also browser plug-ins that can open EPUB format. If you want Kindle to read EPUB eBooks, you need to convert it to MOBI format or AZW3 format. The EPUB format is open source and open. Its interior consists of HTML files and pictures. The better thing about EPUB than PDF is that EPUB can read on screens of various sizes and maintain good results. PDF does not work, the PDF reading experience is very bad on small screen devices. PDF cannot adapt to the screen size. EPUB can re-type content on a small screen, making reading more comfortable and smooth. EPUB can also store sound and video. But it is rarely used in actual use. EPUB can also provide annotations, bookmarks, but this requires software support.