Pilot Model ACE

Pilot Model ACE, the prototype of the Automatic Computing Engine (ACE) on show to the press at the National Physical Laboratory at Bushy Park in Teddington, London, 29th November 1950. Electronic engineer Edward Newman and mathematician James H Wilkinson (1919 - 1986) are second and third from left. Parts of the computer include (from far left to right) the output, control panel and main body. ACE is one of the first computers built in Britain and is a stored-program computer, using 800 vacuum tubes and a memory consisting of mercury delay lines. The machine was designed by Alan Turing before he left the National Physical Laboratory in 1947. (Photo by Jimmy Sime/Central Press/Hulton Archive/Getty Images)