Computer History: First Business Computer UK LEO III (Lyons Electronic Office) (Full Version)

Computer History UK: LEO III Computer Automation of accounting and business practices in 1966 (Full Version). The large-scale transistorized computer LEO III was built in 1961 by LEO Computers Ltd., formed by J. Lyons & Co. The original LEO I computer of 1951, was the first computer built specifically for business applications. This film shows the LEO III computer, a fully transistorized machine, in use at British Oxygen Co. Manchester, UK. The film shows how the LEO III was used to automate accounting processes and increase productivity. Full color, run time 19 minutes.
Uploaded for educational use and historical comment only.
For information on the LEO I computer of 1951, the following video is recommended:
VIDEO - LEO: The Story of the World’s First Business Computer
www.computinghi...
For more information on LEO Computers, visit: --------
LEO Computers Society: * * Also announcing the massively revised book "LEO Remembered-- by the people who worked on the world's first business computers." Edited by Hilary Caminer and Lisa-Jane McGerty, published 2022. An in-depth look at the creation and development of the LEO business computers and the human stories of those involved first-hand with its fascinating history.
www.leo-comput...
TIMELINE for LEO Computers
www.computinghi...
Centre for Computing History
www.computinghi...
Article: “The story of LEO - the World’s First Business Computer”
University of Warwick, UK, Archives
warwick.ac.uk/...
A FEW KEY DATES
1947-1950 Lyons & Co. executives visit ENIAC project staff in U.S. and EDSAC pioneers at Cambridge and learn about computer developments.
1950 Lyons & Co. decides to fun construction of its own computer.
1951 LEO I is completed and ran its first business application
1954 Lyons formed “LEO Computers Ltd.“ to market LEO computers
1957 The LEO II computer was completed
1959 The LEO II/5 was the first LEO to use magnetic tape drives
1960 Installation of LEO II at British Oxygen Co, Edmonton
1961 The LEO III all-transistor computer was completed. The following year, a LEO lII was installed at Hartree House, Queensway, London to augment Service Bureau.
1963 LEO Computers Ltd merger with computer department of English Electric to form English Electric LEO
1963 LEO III computer installed at British Oxygen Co. Ltd., Manchester
1963, LEO Computers Ltd was merged into English Electric Company (EEC) and a subsidiary called English Electric LEO Computers (EEL) was formed, followed by English Electric Leo Marconi (EELM) (1964), later English Electric Computers (EEC) (1967) (LEO 360 and 326 computers followed)
1968 English Electric Company went through a merger with International Computers and Tabulators (ITC) to form International Computers Limited (ICL).
1981 Last LEO model 326 computers (U.K. Post Office) are decommissioned
2002 ICL, after long association with Fujitsu, rebranded itself as Fujitsu. Today, Fujitsu Limited, is a Global 500 company and world's sixth-largest IT services provider.
Around 100 or so LEO III computers were produced from 1961 to the early 1970's. A number stayed in use until the early 1980's.