Control Program for Apple (CP/A) - Atari

operating-system · utility

CP/A was and operating system made by Optimized Systems Software in 1981 for the Atari 8-Bit Home Computer line (400/800/XL/XE). The name was changed for later versions to OS/A+ due to Digital Research, who made Control Program for Microcomputers (CP/M), threatening to sue over the similarity in names.