High Quality Content by WIKIPEDIA articles! The Acorn System 1, initially called the Acorn Microcomputer (Micro-Computer), was an early 8-bit microcomputer for hobbyists, based on the MOS 6502 CPU, and produced by British company Acorn Computers from 1979. The upper board of the Acorn System 1, featuring keypad and LED display. The system was designed by then-Cambridge-undergraduate student Sophie Wilson. Almost all CPU signals were accessible via the standard Eurocard connector.