This format is used as the color palette format for a variety of operating system image editors. It is used to store font templates in text and graphic editors. It allows you to change color intensity and transparency levels.
This is an expansion of the PostScript programming language that’s often used in the publishing business. It was developed in 1982 by Adobe Systems. Before the introduction of PS, printing text and images on one page wasn’t possible. PostScript makes this possible by giving a printer commands to print out text and graphical information as needed. PS also contains print coordinates for objects on a page.