Photograph portrait of Alan Turing, taken on 29 March 1951.

Bates, John AV and the Ratio Club BW photograph of the Ratio Club and guests, c. 1950s Image used in Phil Husbands and Owen Holland, The Ratio Club: A Hub of British Cybernetics, in Husbands, Holland & Wheeler (eds.) The Mechanical Mind in History, MIT Press, 91-148, 2008. Figure 2: Some members of The Ratio Club with guests outside Peterhouse, University of Cambridge, May 1952. The photograph was organized by Donald Mackay. Back row (partly obscured): H. Shipton, J. Bates, W. Hicks, J. Pringle, D. Scholl, J. Westcott, D. Mackay. Middle row: G. Brindley, T. McLardy. W.R. Ashby, T. Gold, A. Uttley. Front row: A. Turing, G. Sutton, W. Rushton, G. Dawson, H. Barlow. Courtesy Wellcome Library for the History and Understanding of Medicine Archives & Manuscripts

Code breaker - Alan Turing's Life and Legacy at London Science Museum

This photo of immovable heritage has been taken in the Walloon Region

Bletchley Park Enigma working aids,1939-45

Alan Turing's office in Hut 8.

GWR Hitachi train at Paddington Station, London commemorating Alan Turing

Code breaker - Alan Turing's Life and Legacy at London Science Museum

Code breaker - Alan Turing's Life and Legacy at London Science Museum

Turing's teddy bear (at Bletchley Park)