The unzip utility is used to list, test, or extract files from a zip archive. Zip archives are commonly found on MS-DOS systems. The zip utility, included in the zip package, creates zip archives. Zip and unzip are both compatible with archives created by PKWARE's PKZIP for MS-DOS, but the programs' options and default behaviors do differ in some respects. Install the unzip package if you need to list, test or extract files from a zip archive.