E.M.I. Electronics Analogue Computer (1957).
It was a vacuum tube based analog computer system designed by the Valve Division of E.M.I. Electronics Ltd. in London as a simulator for studying complex control problems associated with guided weapons. Although people now associate EMI with the music industry, during the 1950s and 60s it was also a giant and important player in the electronics and defense industry producing many ground-breaking components and computers.