Baseball 1979 Robert Leedom FOCAL-65 (V3D) 1977 Aresco Hexpawn 1978 Robert Leedom MOS TECH 6502 BASIC 9-digit v1.1 1977 Microsoft Co. MOS TECH 6502 BASIC 6-digit 1977 Microsoft Co. Micro-ADE 1977 MicroWare Ltd Microchess 1976 Micro-Ware Ltd. KIM-Venture 1979 Robert C. Leedom.