Ferranti Pegasus computer, 1956.
© Science Museum / Science & Society Picture Library
This was designed by Christopher Strachey (1916-1975) while working at the National Research and Development Corporation (NRDC). He based his design on his experiments while working with Elliot Bros. Pegasus I evolved into Pegasus II. Thirty-eight Pegasus Is and IIs were sold, and it was one of the first computers to be built on a production line at Ferranti's factory in Manchester.