The Free On-line Dictionary of Computing (30 December 2018):
WINZIPA Microsoft Windows archiving and compression program, distributed by Nico Mak Computing, Inc. WINZIP has a graphical user interface front end and is compatible with PKZIP. WINZIP can be obtained as shareware, on evaluation, or as a licenced copy. It is much easier to use then PKZIP for DOS, and includes a helpful, help file. (http://winzip.com/). (2000-02-27)