Rebuilding the EDSAC: An Innovative British Computer from 1949
This wonderful video below gives an overview of the effort to rebuild a fully working version of the Electronic Delay Storage Automatic Calculator (EDSAC). EDSAC was an early British computer from 1949 which was one of the first machines which was able to store software. The computer did this with little more than vacuum tubes, punched tape and a teleprinter:
And this related video gives some background on the life of Sir Maurice Wilkes who built EDSAC: