Automatic Computing Engine
The Automatic Computing Engine (ACE) was an early British electronic serial stored-program computer design by Alan Turing. Turing completed the ambitious design in late 1945.
The ACE was not built, but a smaller version, the Pilot ACE, was constructed at the National Physical Laboratory and became operational in 1950. A larger implementation of the ACE design was the MOSAIC computer, which became operational in 1955. ACE also led to the Bendix G-15 and other computers.