Pdf file introduction

The pdf file (Portable Document Format http://www.pdfyueduqi.net.cn) format is an electronic file format developed by Adobe. This file format is independent of the operating system platform, which means that PDF files are common in Windows, Unix or Apple's Mac OS operating system. This feature makes it an ideal document format for electronic document distribution and digital information dissemination on the Internet. More and more e-books, product descriptions, company announcements, web materials, and e-mails are starting to use PDF files. PDF files have now become an de facto industry standard for digital information.

Adobe designed the pdf file format to support cross-platform, multimedia-integrated information publishing and distribution, especially to support the release of web information. To achieve this, PDF has many advantages over many other electronic document formats. The PDF file format encapsulates text, fonts, formats, colors, and graphic images independent of device and resolution in a single file. The format file can also contain electronic information such as hypertext links, sounds and motion pictures, support for special files, and high integration and security.

pdf files use industry-standard compression algorithms, which are usually smaller than PostScript files and are easy to transfer and store. It is also page-independent, with a PDF file containing one or more "pages" that can be processed individually, making it ideal for multiprocessor systems. In addition, a PDF file contains the PDF version used in the file, as well as the location information of some important structures in the file. Due to the advantages of PDF files, it has gradually become a new favorite in the publishing industry.

For ordinary readers, e-books made with PDF have the texture and reading effect of the paper version, which can "realistically" show the original appearance of the original book, and the display size can be adjusted freely, providing the reader with Personalized reading. Since the PDF file can be independent of the operating system's language and fonts and display devices, it is convenient to read. These advantages enable readers to quickly adapt to e-reading and online reading, which is undoubtedly conducive to the popularity of computers and networks in daily life. Based on pdf file technology, Adobe offers a complete suite of electronic and web publishing solutions, including commercial software for generating and reading PDF files, Acrobat, and Illustrator for editing PDF files. Adobe also provides a font package for reading and printing Asian text, namely Chinese, Japanese and Korean characters.