The Free On-line Dictionary of Computing (30 December 2018):

PKWARE, Inc.

    The company, founded by Phil Katz in
   1986, which produces the PKZIP and PKUNZIP compression
   tools and libraries for many platforms.

   (http://pkware.com/).

   Address: 201 E. Pittsburgh Ave., Suite 400, Milwaukee, WI 53204 USA

   (1999-01-07)