Lotus 1-2-3 would quickly become the "killer app" for the nascent IBM-PC, doing for that system what VisiCalc had done earlier for Apple. 1-2-3's success (and corporate in-fighting between Personal Software and VisiCorp) drove VisiCalc sales into the ground almost immediately. Two years later, Lotus would buy out Personal Software. One year later, Lotus would kill VisiCalc. Today, Microsoft Excel documentation still references Lotus 1-2-3, not VisiCalc.
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