Doron Swade and the Phillip's Economic Computer, 1990s.
© Science Museum / Science & Society Picture Library
Doron Swade, senior curator of computing and information technology at the Science Museum, London, with the Phillip's Economic Computer, built in 1949. The machine was conceived by Bill Phillips (1914-1975), a New Zealand-born engineer turned economist. Phillips designed the machine to demonstrate in a visual way the circular flow of money within the economy. Approximately fourteen machines were built, and this particular machine was used as a teaching aid at the London School of Economics. It ran until May 1992.