Electronic digital accounting system. c 1960s.
© NMeM / Daily Herald Archive / Science & Society Picture Library
Electronic digital accounting system used at the International Telephone Exchange, Faraday House, London. 'Every time an international telephone call is made from the UK, payment must be made to overseas telephone administrations for the use of their lines. This equipment has been developed by British Telecommunications Research Ltd, a Plesey Group research organisation. It uses magnetic drum stores and is an advanced form of special purpose data-procesing installation, designed to accept a large number of simultaneous data inputs in 'real time'. It is capable of dealing with information from over 2000 sources simultaneously'.