VisiCorp

VisiCorp was an early personal computer software publisher. Its most famous products are VisiOn and VisiCalc.
It was founded in 1976 by Dan Fylstra and Peter R. Jennings as Personal Software, and first published Jennings' Microchess program for the MOS Technology KIM-1 computer, and later Commodore PET and Apple II versions. It later published a wider variety of games and some applications programs. In 1979 it released VisiCalc, which would be so successful that in 1982 the company was renamed "VisiCorp".