Pdf (abbreviation pdf(portable document format, meaning "portable document format") is a file format developed by Adobe Systems, which is used to exchange files in a way that is independent of applications, operating systems and hardware. PDF file is based on PostScript language image model, which can ensure accurate color and accurate printing effect on any printer, that is, PDF will faithfully reproduce every character, color and image of the manuscript.
Portable document format is an electronic file format. This file format has nothing to do with the operating system platform, that is, PDF files are common in Windows, Unix and Apple's Mac OS operating systems. 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 using PDF files.