where he had studied. It read "Forever changed how people use computers in business." In 2006, Charles Babcock of InformationWeek wrote that, in retrospect, "VisiCalc was flawed and clunky, and couldn't do many things users wanted it to do”, but also, “It's great because it demonstrated the power of personal computing.” Since 2010, the anniversary of the 17 October 1979 launch of VisiCalc has been celebrated as Spreadsheet Day. See also Visi On Triumph of the Nerds, A documentary hosted by Robert X. Cringely that featured the creators of VisiCalc and their contribution as the first killer app for the personal computer. Timeline of computing 1950–1979 References Further reading External links Dan Bricklin's Own VisiCalc Website – With history information as well as downloadable PC version Implementing VisiCalc – By Bob Frankston, on his website Was VisiCalc the "first" spreadsheet? – By Dan Bricklin, on his website Three Minutes: Godfathers Of The Spreadsheet – PC World interview with the creators of VisiCalc Techdirt: What If VisiCalc Had Been Patented? TRS-80 and more TED Talk – "Dan Bricklin: Meet the inventor of the electronic spreadsheet" TEDx Talk – "A Problem That Changed The World | Dan Bricklin | TEDxBeaconStreet" VisiCalc (1979) — Internet Archive, runnable in an emulator in the local browser. Spreadsheet software Microcomputer software Apple II software Atari 8-bit family software 1979 software