The Digital Printer
As an industry, the standard files that are now accepted are Quark, Pagemaker, PostScript and PDF. For quick printers, many of the customer files are created in Word, WordPerfect, Publisher and other software programs. Those files can be converted to PostScript.
Before you convert anything, however, make sure you communicate your intentions with clients. Giles shares a warning: "Quick printers who attempt to receive any file without a set of standards or without a dialogue with the customer about the file are doomed to failure."
—Marie Ranoia Alonso
(Quick Printer News)