Dan Bricklin

Daniel Singer Bricklin (born July 16, 1951) is an American businessman and engineer who is the co-creator, with Bob Frankston, of VisiCalc, the first spreadsheet program. He also founded Software Garden, Inc., of which he is currently president, and Trellix, which he left in 2004. He currently serves as the chief technology officer of Alpha Software.

His book, ''Bricklin on Technology'', was published by Wiley in May 2009. For his work with VisiCalc, Bricklin is often referred to as “the father of the Spreadsheet.” He was one of 6 people spotlighted when the Computer was denoted "Machine of the Year" by ''Time'' magazine in 1982. Provided by Wikipedia