See [Wikipedia](https://en.wikipedia.org/wiki/PostScript) [Ghostscript (Wikipedia)](https://en.wikipedia.org/wiki/Ghostscript) and [Ghostscript home](https://www.ghostscript.com/). Postscript is a language developed by [Adobe](https://www.adobe.com/) in the 80s. It gained popularity as a page description language for printers. It was also used in Sun's NetworkExtensibleWindowSystem.