What does PDF format mean and what is its function?

pdf (short for portable document format) is a file format developed by Adobe Systems for file exchange in a way that has nothing to do with applications, operating systems and hardware.

PDF files are common in Windows, Unix and apple's Mac OS operating system. Moreover, characters, fonts, formats, colors and graphics and images independent of equipment and resolution can be packaged in one file. The format file can also contain electronic information such as hypertext links, sounds and dynamic images, support extra-long files, and have high integration and security and reliability.

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at first, PDF was only regarded as a page preview format, not a production format. However, the market doesn't feel this way, and the market expectation has transformed the focus of this format, thus changing the product. All kinds of e-book readers are flooding the domestic and foreign markets, and have replaced paper media in many fields.

the decline in the reading rate of paper media is largely due to the fact that readers have turned their attention from paper media to electronic books. Although the sales volume of e-book market is far from that of traditional book market, it has a strong development momentum. Most e-reader manufacturers have started to support PDF format in whole or in part.

The widely used PDF e-readers in the market include Dangdang mobile phone reader, Baidu of Zhangmen Technology, September reading of September network, and the developed special reader for Android mobile phone.

on July 13th, 29, Adobe announced that PDF/Archive(PDF/A), as a long-term storage format of electronic documents, has been approved by China National Standardization Administration Committee and officially implemented on September 1st, 29. PDF file has become a de facto industrial standard for digital information.

Baidu encyclopedia -pdf