What is Postscript?
Postsrcipt is an object-oriented language, meaning that it treats images as collections of geometrical objects rather than as bit maps.
Why Are Postscript Files Advantageous?
The principal advantage of object-oriented (vector) graphics over bit-mapped graphics is that object-oriented images allow the user to specify upon opening the resolution and pixel dimensions desired. - Webopedia.com
How Do I Use Postscript Logos?
Using Postscript logos requires Adobe Photoshop, which is available through the University site license. You simply save them to your hard drive, then open them in Photoshop. For a full tutorial, please see 'How to use Postscript files' below.