What is pdf?

The Chinese meaning of pdf is "Portable Document Format". It is a file format developed by Adobe Systems for file exchange in a way that is independent of applications, operating systems, and hardware. It is an electronic file. Format. The PDF file format can encapsulate text, fonts, formats, colors, and graphics and images independent of device and resolution in one file; this format file can also contain electronic information such as hypertext links, sounds, and dynamic images, and supports special features. Documentation, integration, security and reliability are all high.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

PDF (short for Portable Document Format, meaning "Portable Document Format") is a file format developed by Adobe Systems for file exchange in a manner independent of applications, operating systems, and hardware. . PDF files are based on the PostScript language image model, which ensures accurate colors and accurate printing effects no matter what kind of printer is used. That is, PDF will faithfully reproduce every character, color, and image of the original document.

Portable Document Format is an electronic file format. This file format has nothing to do with the operating system platform, that is to say, PDF files are universal whether they are 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, online materials, and emails are beginning to use PDF format files.

The purpose of Adobe's design of the PDF file format is to support the publication and release of multimedia integrated information across platforms, especially to provide support for network information release. To achieve this purpose, PDF has many advantages that other electronic document formats cannot compare with. The PDF file format can encapsulate text, fonts, formats, colors, and graphics and images that are independent of device and resolution in one file. Files in this format can also contain electronic information such as hypertext links, sounds and dynamic images, support special-length files, and are highly integrated, secure and reliable.

For ordinary readers, e-books produced with PDF have the texture and reading effect of paper books, and can realistically show the original appearance of the original book, and the display size can be adjusted arbitrarily, providing readers with personalized way of reading.

PDF files use industry-standard compression algorithms and are generally smaller than PostScript files, making them easier to transmit and store. It is also page-independent. A PDF file contains one or more "pages" and each page can be processed independently, which is especially suitable for multi-processor systems. In addition, a PDF file also contains the PDF format version used in the file, as well as the positioning information of some important structures in the file. It is precisely because of the various advantages of PDF files that they have gradually become the new favorite in the publishing industry.

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