PKZIP=PK Stands For Pakistan And ZIP Stands For Zone Improvement Plan.

PKZIP (also capitalized as PKZip) is a program, originally written for the DOS operating system , that gathers multiple files into a single compressed file that can be stored in less space and transmitted more quickly from one place to another.

PKZIP, which was later renamed PKWare, was invented by Philip K. Katz. PKZIP was a utility which compressed and decompressed data sent through telephone lines to other computers, saving quite a bit of time and money at the time.

PKZIP

PKZIP