J. Biit (standing for: “just because it is there”) is a chess program written in PL/I. The program played in the first United States Computer Chess Championship in 1970. It uses a graphical user interface which was uncommon at the time.
Chaos is a chess program written in FORTRAN. The name is an acronym for "Chess Heuristics And Other Stuff". The program participated in 12 North American Computer Chess Championships and four World Computer Chess Championships.