Pilot Model ACE Engineers

Left to right: Electronic engineer Edward Newman, Supervisor Francis Colebrook (1893 - 1954), mathematician James H Wilkinson (1919 - 1986) and computer scientist Donald Davies (1924 - 2000) with the Pilot Model ACE, the prototype of the Automatic Computing Engine (ACE) at a press viewing at the National Physical Laboratory at Bushy Park in Teddington, London, 29th November 1950. 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)