The Electronic Delay Storage Automatic Calculator (EDSAC), developed at the University of Cambridge is one of the world's earliest general-purpose computers. Volunteers at the National Museum of Computing in Bletchley Park, UK, have been constructing a working replica of an EDSAC machine. Once complete, it will be able to run EDSAC software that was published in scientific papers written in the 1940s and 50s. Such code might be among the world's oldest. – Learn more ➤ Subscribe ➤ Get more from New Scientist: Official website: Facebook: Twitter: Instagram: LinkedIn: About New Scientist: New Scientist was founded in 1956 for “all those interested in scientific discovery and its social consequences”. Today our website, videos, newsletters, app, podcast and print magazine cover the world’s most important, exciting and entertaining science news as well as asking the big-picture questions about life, the universe, and what it means to be human. New Scientist