Microsoft FreeCell

FreeCell, also known as Microsoft FreeCell, is a computer game included in Microsoft Windows, based on a card game with the same name. Paul Alfille implemented Freecell in 1978 for the PLATO computer system at CERL; by the early 1980s Control Data Corporation had published it for all PLATO systems. Jim Horne, who enjoyed playing Freecell on the PLATO system at the University of Alberta, published a shareware $10 DOS version with color graphics in 1988. (wikipedia.org)