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 that ran under
DOS. A copyright lawsuit between System Enhancement Associates and Katz's company,
PKWARE, Inc., was widely publicized in the
BBS community in the late 1980s. Phil Katz's software business was very successful, but he struggled with social isolation and chronic alcoholism in the last years of his life.