The Edsac was first operational in May 1949 and ran for nine years. Since it was scrapped only three of its 140 chassis have survived.
Above is a surviving Edsac chassis, which has been used to create a computer model for the replica chassis that will be used to rebuild the machine.
Photo: National Museum of Computing
Nick Heath is chief reporter for TechRepublic. He writes about the technology that IT decision makers need to know about, and the latest happenings in the European tech scene.