VisiCalc
Computer program
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VisiCalc is the first spreadsheet computer program for personal computers, originally released for Apple II by VisiCorp on October 17, 1979. Wikipedia
Initial release date: October 17, 1979
Developer: Dan Bricklin, Bob Frankston, VisiCorp, and more
Programming language: Assembly language
Operating system: Apple II, Apple SOS, Atari 8-bit family, CP/M, Commodore PET, HP Series 80, MS-DOS, Sony SMC-70, TRSDOS
Stable release: VisiCalc Advanced Version / 1983; 41 years ago