LEO editor

LEO, the Army, the Navy Dockyards and De Havilland, IEEE Annals of the History of Computing, ISSN: 1058-6180.

Lyons Office Journal, Vol. 2, Number 21, March. Report with photo of the visit which includes meeting John Simmons and T.R. Thompson showing LEO I to Royal Party. A copy is held in the London Metropolitan Archive under catalogue number ACC/3527/310 Also CCH

Lyons and Office Management Association. Papers of John Simmons, Reference Number: 363/S4/11, Warwick University, Modern Records Centre. The Chronicle is a diary of events and activities relating to the development and operation of LEO computing – an invaluable source. The Chronicle

How the Cambridge Electronic Calculator works, J. Lyons & Co., June 1949. 
http://www.leo-computers.org.uk/images/How%20EDSAC%20Works.pdf

J. Lyons & Co.
Intended for the Lyons’ Management only a small number were printed. The original version was about 75 pages, though later versions were much longer. Copies are held in the John Simmons Archive at Warwick University Modern Records Centre Showcase: Pioneers: Innovators in Science and Technology, and can be seen on: https://warwick.ac.uk/services/library/mrc/archives_online/exhibitions/pioneers/ and at the University of Manchester John Rylands Library, Manchester Collection on LEO filed as item C130 and at CCH. Appendix 13 in Peter Bird’s book LEO: The First Business Computer is extracted from the guide.

Lyons Office Journal. Vol. 1, July 1951 to June 1953, available as part of the Lyons archive held at the London Metropolitan Museum, catalogue entry: ” ACC/3527/311 Lyons Office Journal. Published for J. Lyons and Co. Ltd. Clerical department.

Published by J. Lyons & Co., Cadby Hall, Feb 16th.

The Economist, pp. 789-791, 13th March, probably authored by Mary Goldring. See also at CCH

The Times, June 24. Also See

by LEO Computers.