Meaning – The term postscript, refers to a standard specified by Adobe Systems, Incorporated, that defines how text and graphics are presented on printers and display devices.
It can be used to define the appearance of graphics and text for both screen and print. Before PostScript was introduced, publishing systems relied on proprietary typesetting systems, which often caused incompatibilities between computers and printing systems.
Adobe PostScript makes it possible to produce high-quality page content that can include text, images, and line art in a standard format compatible with multiple devices.
Almost as complex as PostScript itself is its handling of fonts. The font system uses the PS graphics primitives to draw glyphs as curves, which can then be rendered at any resolution. A number of typographic issues had to be considered with this approach.
Example of usage – “PostScript (.PS) files will print the exact same way from different PostScript compatible printers. They can also be opened using Adobe Acrobat and will look the same on Macintosh and Windows platforms.”