PKWARE Ships PKZIP 2.50 for DOS; Update to PKZIP Version 2.04g.BROWN DEER, Wis.--(BUSINESS WIRE)--March 30, 1999--PKWARE, Inc., today begins shipping its new DOS based version of the original .ZIP compression utility. PKZIP(R) 2.50 for DOS is an update to the venerable 2.04g DOS version, released in 1993. The DOS version of PKZIP first introduced the .ZIP archive in 1989 and quickly became the world wide standard for flexible and fast archiving and lossless data compression Lossless data compression is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. This can be contrasted to lossy data compression, which does not allow the exact original data to be reconstructed from the . PCZIP 2.50 for DOS has a flexible command line interface and still includes three separate executables; PKZIP, PKUNZIP and ZIP2EXE Exe (ĕks), river, c.55 mi (90 km) long, rising in the Exmoor, Somerset, SW England, and flowing S across the Cornwall peninsula, past Exeter to the English Channel at Exmouth. (PKSFX). This is important for power users wanting to automate zipping and unzipping functions within batch files. PKZIP will work on any x86 compatible computer running DOS 2.0 or later. New advanced features in PKZIP 2.50 will use DOS Protected Mode Interface DOS Protected Mode Interface - (DPMI) The method which Microsoft prescribes for a DOS program to access extended memory under a multitasking environment, e.g. Microsoft Windows. This service is provided by the HIMEM.SYS driver on IBM PCs. (DPMI (DOS Protected Mode Interface) A Microsoft programming interface that allowed a DOS-extended program to run cooperatively under Windows 3.x. It was not compatible with VCPI, the first DOS extender standard. ) in Windows 95/98, OS/2, and other DPMI supported environments to run 32-bit code for better & faster compression performance. New capabilities of PKZIP for DOS include full support of Windows 95 or Windows 98 Long File Names File names that exceed the common eight plus three (8.3) character limitation used in DOS and Windows 3.1. Unix, Mac and Windows starting with Windows 95 support long file names. For compatibility with the 8. (LFNs). Users are no longer limited to DOS 8.3 file names when running in a Windows 95 or Windows 98 command line environment. Users can extract, store and view LFNs inside a .ZIP archive without truncating the filename. Additionally, PKZIP 2.50 increases the file storage limitation from 5,000 to over 16,000 files stored in a single .ZIP archive. The ability to store more files in a .ZIP archive is a great benefit to anyone doing backup and restore operations using PKZIP. This version also offers full year 2000 compliance, and several new features and performance enhancements. "Long file name support was the number one feature requested from our users in an update to PKZIP 2.04g," said Phil Katz, president of PKWARE. "Now anyone running from a Windows 95 or 98 command line can work with native long file names and not have to think about truncated 8.3 names any longer." Registered users, who purchased PKZIP 2.04g for DOS, have two ways to choose from to obtain the upgrade to PKZIP 2.50 for DOS. First, a free 2.04g to PKZIP 2.50 for DOS upgrade patch is available for download from PKWARE's web site at http://www.pkware.com. Or secondly, a 3.5" diskette The official name for the floppy disk. See floppy disk. diskette - floppy disk containing the upgrade patch can be ordered directly from PKWARE's web site. A charge of $6 to cover materials, handling and US Postal Service delivery will be charged for the diskette. The upgrade patch will look for and upgrade only the registered version of PKZIP 2.04g for DOS. PKZIP is available separately on many software and hardware platforms. For Windows users, there are two different interface versions available. For users who want the point-and-click ease of a graphical user interface graphical user interface (GUI) Computer display format that allows the user to select commands, call up files, start programs, and do other routine tasks by using a mouse to point to pictorial symbols (icons) or lists of menu choices on the screen as opposed to having to (GUI (Graphical User Interface) A graphics-based user interface that incorporates movable windows, icons and a mouse. The ability to resize application windows and change style and size of fonts are the significant advantages of a GUI vs. a character-based interface. ), PKZIP 2.60 for Windows comes bundled with both 16 and 32-bit executables for Windows 3.1x, Windows 9x and Windows NT. For Windows 9x and Windows NT power users, who want the flexibility of a command line interface (CLI (1) (Call Level Interface) A database programming interface from the SQL Access Group (SAG), an SQL membership organization. SAG's CLI is an attempt to standardize the SQL language for database access. ), PKZIP 2.50 Command Line for Windows NT/9x is available. Separate 32-bit native versions of PKZIP 2.50 Command Line for Windows NT/9x are available for x86, Alpha or PowerPC systems. Other available PKZIP platforms include OpenVMS for Alpha or VAX (Virtual Address eXtension) A venerable family of 32-bit computers from HP (via Digital and Compaq) introduced in 1977 with the VAX-11/780. VAX models ranged from desktop units to mainframes all running the same VMS operating system, and VAXes could emulate PDP models , OS/2, and many UNIX UNIX Operating system for digital computers, developed by Ken Thompson of Bell Laboratories in 1969. It was initially designed for a single user (the name was a pun on the earlier operating system Multics). platforms. Pricing and Availability PKZIP 2.50 for DOS is priced at $47 and is available immediately. You may order direct from PKWARE by calling (414) 354-8699. Additional information is available on the Internet at http://www.pkware.com, by sending email to info@pkware.com or by dialing our BBS (1) (Bulletin Board System) A computer system used as an information source and forum for a particular interest group. They were widely used in the U.S. at (414) 354-8670. PKWARE Background Founded in 1986, PKWARE develops and markets award-winning compression tools and utilities for both the developer and consumer markets. Its products include PKZIP(R), PKLITE(R), PKLITE Professional(R), PKZFIND(TM)/PKZOOM(TM) and the PKWARE Data Compression Library(R) products for multiple hardware and software platforms. PKWARE products are also available through a growing network of distributors and retailers in the US and internationally. PKWARE, the PKWARE logo, PKZIP, PKUNZIP, PKSFX, PKLITE, PKLITE Professional and PKWARE Data Compression Library are registered trademarks of PKWARE, Inc. PKZFIND, PKZOOM and ZIP2EXE are trademarks of PKWARE, Inc. OS/2 and PowerPC are trademarks or registered trademarks of International Business Machines Corporation. Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Trademarks of other companies mentioned in this documentation appear for identification purposes only and are property of their respective companies. |
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