What is the PDF format?

the full name of pdf is Portable Document Format, which was developed by Adobe Systems for file exchange in 1993.

PDF is mainly composed of three technologies: it is derived from PostScript；; Font embedding system; Data compression and transmission system. Its advantages lie in its cross-platform, its ability to retain the original Layout of documents, its open standard, and its ability to freely develop PDF-compatible software without royalty. It is an open standard and became the ISO 32 international standard in December 27.

Extended data:

Technical points-

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

Baidu encyclopedia -pdf (portable document format)