Acorn System 1

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 main parts of the system were designed by then-Cambridge-undergraduate student Sophie Wilson, with a cassette interface design by Steve Furber. It was Acorn's first product, and was based on an automated cow feeder.
It was a small machine built on two Eurocard-standard circuit boards and it could be purchased ready-built or in kit form.
Main Components (left to right)
Almost all CPU signals were accessible via the standard Eurocard connector on the right-hand side of the board. This connector was not fitted/supplied as standard with the kit version.
The System 1 front board was used as the control panel for the fictional computer Slave in the 1981 series of the BBC science-fiction series Blake's 7.