Phil Katz

Between 1994 and September 1999 Katz was arrested five times for operating after suspension or revocation of his driver's license. After the lawsuit PKWARE released one last version of his PKARC and PKXARC utilities under the new names "PKPAK" and "PKUNPAK" and from then on concentrated on developing the separate programs PKZIP and PKUNZIP which were based on new and different file compression techniques.

Phillip Walter Katz (November 3 1962 – April 14 2000) was a computer programmer best known as the co-creator of the ZIP file format for data compression and the author of PKZIP a program for creating zip files which ran under DOS.