of the same name), was a package of DOS network and stand-alone utility software for use with WordPerfect. The package included a DOS menu shell and file manager which could edit binary files as well as WordPerfect or Shell macros, calendar, and a general-purpose flat file database program that could be used as the data file for a merge in WordPerfect and as a contact manager. After Novell acquired WordPerfect Corporation, it incorporated many of these utilities into Novell GroupWise. LetterPerfect In 1990 WordPerfect Corporation also offered LetterPerfect, which was a reduced-functionality version of WP-DOS 5.1 intended for use on less-capable hardware such as the laptops of the day, and as an entry-level product for students and home users; the name (but not the code) was purchased from a small Missouri company that had produced a basic word processor for early Atari computers. LP did not support tables, labels, sorting, equation editing or styles. It sold for about US$100 but did not catch on and was soon discontinued. DataPerfect Another program distributed through WordPerfect Corporation (and later through Novell) was DataPerfect for DOS, a fast and capable hierarchical database management system (DBMS) requiring as little as 300 KB of free DOS memory to run. It was written by Lew Bastian. In December 1995, Novell released DataPerfect as copyrighted freeware and allowed the original author to continue to update the program. Updates were developed until at least 2008. DataPerfect supports up to 99 data files ("panels") with each holding up to 16 million records of up to 125 fields and an unlimited number of variable-length memo fields which can store up to 64,000 characters each. Networked, DataPerfect supports up to simultaneous users. PlanPerfect Another program distributed through WordPerfect Corporation was PlanPerfect, a spreadsheet application. The first version with that name was reviewed in InfoWorld magazine September 1987. WordPerfect for Windows History WordPerfect was late in coming to market with a Windows version. WordPerfect 5.1 for Windows, introduced in 1991, had to be installed from DOS and was largely unpopular due to serious stability issues. The first mature version, WordPerfect 5.2 for Windows was released in November 1992 and WordPerfect 6.0 for Windows was released in 1993. By the time WordPerfect 5.2 for Windows was introduced, Microsoft Word for Windows version 2 had been on the market for over a year and had received its third interim release, v2.0c. WordPerfect's function-key-centered user