Books

Baker, Rob (2015) ‘Beautiful Idiots and Brilliant Lunatics: A sideways look at twentieth century London’, Amberley Publishing Limited. Chapter 22 includes the story of Lyons and its place in London, and notes its role in the development of LEO and business computing. See Google Books

Bird, P. (2000) ‘The First Food Empire: A History of J. Lyons and Company’, Phillmore.
Peter Birds account of the history of J. Lyons including a reference to the LEO initiative.

Bruderer, H. (2015) ‘Meilensteine der Rechentechnic (Milestones in Computer History)’, De Gruyter Oldenbourg, Berlin/Boston. This 820-page book written in German has a number of references to LEO throughout the book. The author is a Swiss academic.

Bruderer, Herbert: Milestones in Analog and Digital Computing, Springer Nature Switzerland AG, Cham, 3rd edition 2020, 2 volumes, 2113 pages, 715 illustrations, 151 tables, English
version. https://www.springer.com/de/book/9783030409739

Campbell-Kelly, M. (1989) ‘ICL A Business and Technical History’, Clarendon Press, Oxford.
The history of ICL is synonymous with the history of the British computer industry. ICL was formed by a series of mergers in response to the increasing market dominance of the large American corporations, particularly IBM. The struggles between these two giants and the inherent problems and implications of competing with US multi- nationals are examined in detail in Campbell Kelly’s wide-ranging study. At the time of writing in the late 1980s, the author was given unrestricted access to ICL archives and his lucid account of the company, its set-backs and successes makes for a compelling and informative read. This book, which was Winner of the Wadsworth Prize for Business History (1989), will be of great interest to anyone involved in business or the computing industry.

See Google Search

Carmichael, Hamish (ed.) (1996) ‘An ICL anthology’, Chapter 6, LEO, pp. 91-94, Laidlaw Hicks Publishers, Surbiton. Chapter 6 presents an anthology of quotations about LEO, mainly from LEO personnel
See An ICL Anthology

Ceruzzi, Paul E. (2003) ‘A History of Modern Computing’ (2nd edition), MIT Press. Reports on the role played by Lyons and LEO in the development of business computing. See A History of Modern Computing

review of LEO Remembered coupled with reference to LEO Film and the Science Writer’s award, published in Winter Edition of IT NOW, Volume 64, Issue 4.  The British Computer Society publishes 35,000 copies of IT NOW.  See: IT Now

Davis,G.R., Editor (2005), Management Information Systems, in the chapter ‘History of Organisations using Information Systems’ notes on page 147 UK enterprises including Lyons and LEO but mistakenly states Lyons worked with Manchester University not Cambridge University. Volume 7 The Blackwell Encyclopedia of Management.

Glass, R.L., (199), In the Beginning: Personal Recollections of Software Pioneers, pages 134 – 153, published by IEEE Computer Society, Los Alamos, CA, includes Land, F.. LEO the First Business Computer: A personal recollection, Frank Land. See In the Beginning