Turner Hall Card Clock Driver (1985) 0 DOS

This is a clock driver required to use the real-time clock on "The Turner Hall Card", a memory expansion/clock card for IBM PCs.

• 1985

VersaCAD (1988) 5 Graphics Engineering DOS

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)

• 5.3

VisiCalc (1982) 3 Spreadsheet DOS Other

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, VisiSchedule 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.

• 1.x
• Advanced Apple III
• IV
• Advanced IBM

Watcom Pascal (1988) 1 DOS

Watcom Pascal is a Pascal interpreter produced by Watcom. The original Watcom Pascal products were called the Waterloo Pascal compiler and the Waterloo microPascal interpreter. For a time, it competed with Borland Turbo Pascal.

• 3.5