October 11, 1979: Visicalc – First Killer PC App Released

Visicalc - Dan Bricklin
Dan Bricklin Shows off Visicalc

1979Visicalc is released by Dan Bricklin. The spreadsheet application is called the first killer app for personal computers. It turned the PC from a hobby to a business tool. Only downfall for Bricklin was he did not patent the system, therefore, clones like SuperCalc, Microsoft’s MultiPlan and Lotus 1-2-3, would show up.

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