.PS File Extension Description:

The .PS file extension is a PostScript file type that falls under the category of Vector Image Files. It is an image saved in the PostScript page description language and may also include vector graphics and text.

Similar to other file types, this file can be opened using both Mac OS and Windows Programs but unlike them, it can be printed directly using a PostScript printer without it being opened in an application. The PostScript file is usually regarded as an intermediary file between an application and a postscript printer.

Learn more about .ps files here: http://ps.file-extension-library.com/