subLOGIC Corporation is an American software development company. It was formed in 1975 by Bruce Artwick while attending the University of Illinois at Urbana–Champaign, and incorporated in 1978 by Stu Moment. SubLOGIC created the flight simulation program FS-1 for the Apple II in 1980, followed by the more ported and popular Flight Simulator II in 1984. In 1982, Flight Simulator was licensed to Microsoft, and through 2006 Microsoft released major updates to Microsoft Flight Simulator approximately every three years.