11th May 1979
VisiCalc Given First Public Demonstration.
Harvard MBA candidate Daniel Bricklin and programmer Robert Frankston gave the first demonstration of VisiCalc, the program that made a business machine of the personal computer, for the Apple II. VisiCalc (short for visible calculator) automated the recalculation of spreadsheets. A huge success, more than 100,000 copies were sold in the first year.
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