embedded systems. Another notable 8-bit CPU is the MOS Technology 6502. It, and variants of it, were used in a number of personal computers, such as the Apple I and Apple II, the Atari 8-bit family, the BBC Micro, and the Commodore PET and VIC-20, and in a number of video game consoles, such as the Atari 2600 and the Nintendo Entertainment System. Use for training, prototyping, and general hardware education 8-bit processors continue to be designed today for general education about computer hardware, as well as for hobbyists' interests. One such CPU was designed and implemented using 7400-series integrated circuits on a breadboard. Designing 8-bit CPU's and their respective assemblers is a common training exercise for engineering students, engineers, and hobbyists. FPGA's are used for this purpose. See also Kenbak-1 References Data unit