I think a version of UNZIP was written for just about
every old computer
at some point or another (I know an Apple ][ version was eventually
written in the late 80s).
I know that the Amiga and Atari ST's had their versions, but
there was a fairly major format change at some point that could cause
a problem for older versions of the software on non-PC clones. If I
recall correctly, PKZIP/UNZIP was actually an outgrowth of PKware's
earlier PKARC/PKXARC programs and it changed names when Sea
Associates complained about the closeness of the name to their
products (ARC & UNARC), whcih they were compatible with. This was in
late '87 or early '88 and BBS's started boycotting the use of
ARC/UNARC and switched to ZIP as the defacto compression standard.
Jeff
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757