pdf (Portable Document Format short, meaning "Portable Document Format"), is used by Adobe Systems with applications, operating systems, hardware, document exchange unrelated to the development of the file format. PDF files to PostScript language image model as the basis, no matter what kind of printer can ensure accurate color and accurate printing results, that is, PDF will faithfully reproduce the original every character, color and image.
Portable Document Format is an electronic file format. This file format is independent of the operating system platform, that is to say, PDF files are common whether in Windows, Unix or Apple's Mac OS operating system. This feature makes it in the Internet for electronic document distribution and digital information dissemination of the ideal document format. More and more e-books, product descriptions, company brochures, network information, e-mail in the beginning of the use of PDF format files.
Adobe designed the PDF file format in order to support cross-platform, multimedia integration of information publishing and distribution, in particular, to provide support for network information distribution. In order to achieve this purpose, PDF has many other electronic document format can not be compared to the advantages of PDF file format can be text, font, format, color and independent of the device and resolution of the graphic images encapsulated in a file. The format file can also contain hypertext links, sound and moving images and other electronic information, support for extra-long documents, integration and security and reliability are high.