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 UK. He writes about the technology that IT-decision makers need to know about, and the latest happenings in the European tech scene.