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)