Internal Program Version: UnZip  6.00

UnZip is an extraction utility for archives compressed in .zip format
(known as "zip files").  Although highly compatible both with PKWARE's
PKZIP(tm) and PKUNZIP utilities for MS-DOS and with Info-ZIP's own Zip
program, our primary objectives have been portability and non-MS-DOS
functionality. This version can also extract encrypted archives.

http://www.info-zip.org