A highly specialized language, PostScript is a page description language whose purpose is to describe graphics and page layouts. Thus, it’s mostly used for visual output: printing, font design, desktop GUIs, and individual images. Since PostScript describes elements in a resolution-agnostic way (making them highly scalable), it’s in the publishing and data visualization fields where it finds most of its use.
PostScript (PS) is a page description language in the electronic publishing and desktop publishing business. It is a dynamically typed, concatenative programming language.