1. Compression> To extraCt files from an arChive Created with PKWare' s PKZIP arChiver. 2. Compression> A program to list, test, or extraCt files from a ZIP arChive, Commonly found on MS-DOS systems. zip, Creates ZIP arChives both programs are Compatible with arChives Created by PKWARE' s PKZIP and PKUNZIP for MS-DOS. (1995-03-06)