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Ultracalc, from Lattice Inc, is an electronic spreadsheet program that was available for CP/M, DOS, and Unix. It includes an algebraic expression analyzer that supports 11 operators and 22 functions. The system employs a menu-driven format and includes an extensive set of prompts, on-line help and error messages. Ultracalc is written in C and was considered highly portable.


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First released in 1983 by T & W Systems Inc (later Versacad Corporation) and based on their earlier T-Square product, VersaCAD is a sophisticated professional object design and drawing tool for the IBM PC. It competed heavily against AutoCAD. A very in-depth history of VersaCAD can be found on Cadhistory (PDF Link)


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VisiCalc was the first spreadsheet program for personal computers. It was extremely successful, and pivotal as it was significantly responsible for moving personal computing out of the realm of hobbyists and in to the realm of serious business tools. application suite that also included VisiWord, VisiFile, VisiSpell, VisiTrend/Plot, and VisiTutor. a GUI based environment. But that did not catch on. The similarly named Visi On Calc spreadsheet is not at all related to VisiCalc, and later had to be renamed to Visi On Plan.