PS - PostScript File is a beneficial format to have installed on your computer. The reasons behind this are that graphics and other images are saved and printed by this type of format. If you own a PostScript printer, you will be able to make use of this file. You won’t even have to worry about opening it in a different application. .PDF replaced many PS files, but a lot of people still make use of them the best way that they can. This is because there are still many programs and printers that support PS files and formats. It is wroth having and definitely gives you great results in the end.