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 downloaded from: http://contentdm.warwick.ac.uk/cdm/ref/collection/leo/id/263 http://www2.warwick.ac.uk/services/library/mrc/explorefurther/images/pioneers/ files as item MSS.363/S4/12 and at the University of Manchester John Rylands Library, http://archives.li.man.ac.uk/ead/html/gb133nahc-leo-p1.shtml, filed as item
C130. Appendix 13 in Peter Bird’s book LEO: The First Business Computer is extracted from the guide.