Lotus 1-2-3

Lotus Development Corporation, released Jan 26, 1983

Wikipedia article: Lotus 1-2-3

History of Lotus 1-2-3

“Mitch Kapor founded Lotus with Jonathan Sachs in 1982.  Kapor had come from VisiCalc, a competitor, and Sachs had come from a company that created spreadsheet software for the Data General minicomputer. ”

Lotus History: The First 5 Years