Zip for DOS (ver 2.31) Freeware The Info-ZIP Zip compressor utility will create .ZIP compressed archive files. Zip is similar to the popular (but not fully Y2k compliant) commercial PkZip ver2.04g compression software from PKWARE. Please note that the command line switches differ from PkZip. Typical command line usage => zip -r *.* If there is no "TZ" (Time Zone) Environment variable, the software will issue a warning message. TZ uses the following structure: TZ=zzz[+/-]d[d][lll] where "zzz" is a required three-character string with the name of the current time zone, "[+/-]d[d]" is a required field with an optionally signed number of one or two digits specifying the local time zone's difference from GMT in hours, and "lll"is an optional three-character field with the name of the local time zone during daylight savings time. This command should be placed in your AUTOEXEC.BAT file. For example, the following command sets the time zone to Pacific Time: set TZ=PST8PDT .