Overview

“Portable Document Format” is shorted as “PDF.” One of the file extensions used most often is this one since it can be opened on the web and using any operating system. Supported on several platforms, this independent file format is not dependent on the basic computing resources that is, the operating system, software, or hardware. A PDF file can hold a lot of various kinds of data, including lists, graphs, images, and text.

Category

It belongs to the document format.

Developer

The most popular format was developed by Adobe Systems.

Supportive Apps

It supports Adobe Acrobat Reader to create and open. Kindly note that Adobe Systems is patent to PDF but anyone can create the extension without paying to Adobe Systems. Its license is royalty-free.

MIME Types

It has several MIME types including

application/pdf

applications/vnd.pdf

application/x-pdf

application/acrobat

text/pdf

text/x-pdf

Signature

It supports digital signatures.

Structure of the File

It is based on the COS and PostScript Imaging model.

The tree format of COS includes- Boolean Values, Numbers, Strings, Names, Arrays, Dictionaries, Streams, and The Null Object.

Adobe PDF viewer and any free or paid PDF viewer can help to view a PDF file.