The formats of e-books supported by mobile devices are generally PDF, TXT, Word, etc. The following are the main differences among various e-book formats: 1. Exe file format, which is a popular e-book file format at present, is favored by many people, and the tools for making this format are also the most. Its biggest feature is easy to read and simple to make. The produced e-book is quite beautiful and can be read without installing a special reader. E-books in this format have low requirements for the running environment. However, this format of e-books also has some shortcomings. For example, EXE files produced by most related production software do not support Flash, Java and common audio and video files, and need the support of IE browser. 2.TXT file format The text document format in computers should be widely used in electronic products now. Now TXT novels are the most common, which can not only be conveniently opened on computers, but also downloaded to MP3 and mobile phones. 3.CHM file format CHM file format is a help file system based on the characteristics of HTML files, which was introduced by Microsoft 1998 to replace the early WinHelp system. In Windows 98, CHM type files are called "compiled HTML help files". The JavaScript, VBScript, ActiveX, Java Applet, Flash, common graphic files (GIF, JPEG, PNG) and audio and video files (MID, WAV, AVI) supported by IE browser are also supported by CHM, and can be linked to the Internet through URL. 4.HLP file format HLP file format is a help file system used by early operating systems. This format does not require much for the reader's operating system, and Windows 95 and later versions can run. At present, the help files of many software running on Windows platform are almost in HLP format. Of course, with the introduction of Microsoft CHM help file system and the development of operating system, HLP file format is likely to be replaced by CHM. The disadvantage of HLP file format is that it is not beautiful enough. Because many people now put forward higher requirements for the aesthetics of e-books, e-books in this format are not very popular on the Internet at present. But what is certain is that this format of e-books is simple to make and easy to obtain, and has no special requirements for readers. In addition, many software help files are still using this format, so this format will not quit the historical stage in a short time. 5.pdf file format PDF file format is an electronic reading file format developed by Adobe Company in the United States. This file format e-book needs the company's PDF file reader Adobe Acrobat Reader to read, so readers are required to install this reader on their computers. This reader is completely free and can be downloaded from Adobe's website. The advantages of PDF are beautiful appearance, convenient browsing and high security. However, this format does not support various HTML-based technologies such as CSS, Flash, Java and JavaScript, and is only suitable for browsing static e-books. E-books in PDF format can be made and edited by Adobe Acrobat, and the latest version is 4.0. 6.WDL file format (WDL is an electronic reading file format developed by Beijing Kang Hua Company, which is currently used by many large electronic publications in China. Its characteristic is that the original layout is well preserved, and e-books can be read online or downloaded locally, but they need to be read by the company's special reader DynaDoc for free, and can be downloaded from the company's website for free. This format of e-books properly protects the interests of authors and publishers due to the restrictions on printing and reproduction. Like PDF format, this format still does not support some of the above effects. But it supports image import. This format deals well with the balance between the text quality of file images and the final product size, and the compression rate of files using this format is generally high. E-books of all sizes are good choices. Making e-books in this format requires the company's software DynaDoc generator. There is no * * * version of the software at present. Readers can go to the company's website to find information about the software. 7.SWB file format SWB format is a relatively rare electronic reading file format. It is a proprietary format of the software WinEbook compiler (formerly known as the Super Winbook 98 compiler). Because this format of e-books can only be made with this software, and readers with this software need to browse. So at present, the e-book market in this format is not very big. 8.LIT file format This format is a proprietary file format of Microsoft Reader, a software developed by Microsoft Corporation of the United States. Because the file format has just been introduced, it does not support various technologies related to HTML at present, but only supports the browsing of pictures. However, this format does not support Chinese. At present, this file format has not been widely used in making and publishing e-books in China. 9.EBX file format This format has only recently appeared, and its reading style is very similar to that of Microsoft Reader. E-books in this format can be read by a reader named Glassbook Reader, and the format can also include multimedia documents such as sounds and waves. Barnes &; Noble provides a large number of e-books about this format. 10.RB file format "Rb" is the abbreviation of "Rocket eBook", which is an e-book reader similar to a handheld computer. Legend has it that it can also be used to do other work, but it has not been verified so far. 1 1.ebk file format This format is the reading software format of Navigator's MAC (and also the PC format). At present, some domestic websites have begun to use this format. The most famous is that "Baibo Electronic Book City" took the lead in publishing electronic books using this file format. This format of e-books is characterized by downloading a client software first, and then logging into the site designated by the software before downloading books. 12.CEB file format CEB is a Chinese e-book, which is a completely high-fidelity Chinese e-book format. The format used by Founder ApabiReader, a brand-new e-book reading tool developed by Founder Electronics Co., Ltd. of Peking University, can keep all the information of the original document, including pictures, numerical formulas, chemical formulas, tables, chess and cards, music scores, etc. At the same time, this format compresses characters and images well, and the amount of file data is small. 13. CAJ file format (referred to as "China Academic Journal") was edited and produced by the editorial department of academic electronic publications of Tsinghua University CD National Engineering Research Center and Beijing Tsinghua Information System Engineering Company. For readers, after finding a specific article, they can visit the full-text database of China Journal Network and download the corresponding CAJ file. You can use CAJ file reader CAJViewer to read and print CAJ files obtained through "full-text database" locally. 14.PDG file format Beijing Century Superstar Company has its own digital technology of graphic materials (PDG) and special reading software-Superstar book SSReader, which has formed a complete set of solutions for digital libraries. It has been successfully applied to more than 500 units at home and abroad, such as Central Archives, Zhongshan Library, Shenzhen Library, PLA Medical Library, Wenzhou Library and University of California, San Diego Library. , and has become one of the basic modes of digital library construction in China and even the whole world. 15. NLC file format of National Library of China NLC e-book format. It compresses the scanned book image into a very small NLC file according to JBIG standard. NLC file is a variant of JBIG format. You can use the software Book Reader for NLC to read the web page format and HTML file format of. 16, and just open it directly with a web browser. 17, ABM file format is a brand-new digital publishing format. The biggest advantage of this format is that it can combine text content with pictures, audio and even video animation into an organic whole. When reading, it can bring all-round enjoyment in vision and hearing. 18, UMD file format This format was originally an e-book format supported by Nokia's mobile phone operating system. To read e-books in this format, you need to install relevant software on your mobile phone. However, many java mobile phones can also watch it after downloading reading software. 19, JAR file format JAR file format is based on the popular ZIP file format. Different from ZIP files, JAR files are not only used for compression and publishing, but also for deploying and encapsulating libraries, components and plug-ins, which can be directly used by compilers, JVMs and other tools. JAR contains some special files, such as manifest and deployment descriptor, which are used to instruct tools how to deal with a specific JAR.

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