jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[primarily MS-DOS/Windows] To create a compressed archive from a group of files using PKWare's PKZIP or a compatible archiver. Its use is spreading now that portable implementations of the algorithm have been written. Commonly used as follows: “I'll zip it up and send it to you.” See tar and feather.