Philip Mark Katz is best known for creating the PKZIP file compression utility, released in 1989. It was a popular and widely used tool for compressing files and reducing their size, making it easier to share and store them.
While he is recognized for his work in file compression, he also contributed to other areas:
* PKWARE Inc., a company he founded.
* Development of several other compression algorithms and programs.
* Pioneering work in file compression techniques.
It's worth noting that while both Philip Zimmermann and Philip Mark Katz worked in the realm of computer security and data compression, they are two distinct individuals with different contributions.