Electronic delay storage automatic calculator. The EDSAC was started by Professor Maurice Wilkes in 1946. The first log entry of the machine working is on the 6th of May 1949, when the EDSAC computed a table of squares. The EDSAC was added to over its life, with the addition of a telephone dial, a faster teleprinter, several new instructions, and an index register. The machine was finally shut down in 1958 to make way for the new EDSAC 2.
