The EDSAC - an Electronic Calculating Machine

Abstract

The EDSAC is a large-scale electronic calculating machine in which ultrasonic delay units are used for storage of orders and numbers. It is serial in operation and works in the scale of two. Punched tape is used for input and a teleprinter for output. The paper describes the functions of the various units of which the machine is composed, and explains with block diagrams the manner in which orders are taken one by one from the store and executed.