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A file compression and archiver utility for MS-DOS and Microsoft Windows from PKWARE, Inc.. PKZIP uses a variation on the sliding window compression algorithm. It comes with pkunzip and pklite and is available as shareware from most FTP archives in a self-expanding MS-DOS executable.

Current versions as of 1999-10-07: PKZIP 2.60 GUI for Microsoft Windows 3.1x, Windows 9x, Windows NT; PKZIP 2.50 Command Line for Windows 9x NT; PKZIP 2.04g for MS-DOS; PKZIP 2.51 for Unix, (Linux, SPARC Solaris, Digital, HP-UX, IBM AIX and SCO Unix); PKZIP 2.50 for OS/2; PKZIP for Open VMS/VAX.

WINZIP is a version with a GUI for Microsoft Windows.

A distribution in about 1995-06-22 claiming to be "PKZIP 3" was actually a trojan horse which attempted to reformat the hard disk and delete all files on it.

References in periodicals archive ?
TELECOMWORLDWIRE-September 30, 2010-PKWARE releases new version of PKZIP and SecureZIP for z/OS on System z(C)1994-2010 M2 COMMUNICATIONS http://www.
WORLDWIDE COMPUTER PRODUCTS NEWS-September 30, 2010-PKWARE releases new version of PKZIP and SecureZIP for z/OS on System z(C)1995-2010 M2 COMMUNICATIONS http://www.
Today, SecureZIP and PKZIP are used by over 200 government agencies and 30,000 corporate entities, including 90% of the Fortune 100.
Compression/Decompression performance of up to 6Gbps for GZIP, PKZIP and variant protocols with unmatched compression ratios.
We have been working with Lufthansa Systems since 2000, initially with our PKZIP data compression solutions, which were operating within their data center.
Developers can now integrate the company's PKZIP data compression and SecureZIP data security technologies into their custom applications and packaged software products.
a provider of trusted ZIP Solutions for the Enterprise, has announced enhancements to its award-winning PKZIP product for Windows.
a provider of Trusted ZIP Solutions, have launched the RSA SureFile software powered by PKZIP, a new desktop security and data compression solution designed to make it easy for businesses to efficiently and securely move more of their sensitive, business-critical information online to help speed business processes and lower costs.
The applications, are in the PDF, PKZIP and EXE formats, and there are directions for accessing the documents in each of the three formats, along with links for any additional software necessary.
Sure, you can compress the BMP file into something much smaller with PKZIP or WinZip, but it turns out that not everyone at the other end knows how to UNZIP files.
Zip-It is more feature-rich than other archiving utilities such as PKZIP and PKUNZIP, the popular shareware programs (available freely on the Web at www.