There are many special projects, some large, some small, undertaken by volunteers at TNMOC. Here are a few of the major current and recent restorations and recreations.
EDSAC, dating from the 1950s and the world's first computer designed for users, is being recreated at TNMOC.
The Harwell Dekatron aka WITCH Computer, first operated in 1951, becoming acknowledged by 1973 as the world's most durable computer, has been restored and is now the world's oldest original working digital computer.
The story of the Rebuild of Colossus Mark II by a team led by Tony Sale.
The Robinson was one of the early attempts to industrialise code-breaking during World War II. Robinson predated Colossus -- in fact the Colossus computers came about because of the problems that the Robinson machines uncovered.
The Museum's largest computer, the huge ICL 2966 from around 1985/7, is coming back to life. It's a mainframe and occupies almost a third of the floor space in the large systems gallery.