After becoming interested in computers, he joined the British Computer Society (BCS) in 1965 as Associate Member, being elected to Member in 1967, Fellow in 1988 and Honorary Fellow in 1996.He was elected to the Council of the BCS for the period 1967–70. In 1965, was a founder member of the Bedfordshire branch of the BCS and was named Chairman in 1979.
In 1992, he was Secretary to the newly formed Bletchley Park Trust, later unpaid Museums Director in 1994. In 1993 he started the Colossus Rebuild Project, inaugurated in 1994, to rebuild the Colossus computer developed and built by Tommy Flowers at the Post Office Research Station at Dollis Hill in 1943.
Sale lectured on wartime code breaking in the UK, Europe and the US. He was technical adviser for the 2001 film Enigma.
Front view of the Colossus rebuild showing, from right to left (1) The "bedstead" containing the message tape in its continuous loop and with a second one loaded. (2) The J-rack containing the Selection Panel and Plug Panel. (3) The K-rack with the large "Q" switch panel and sloping patch panel. (4) The double S-rack containing the control panel and, above the image of a postage stamp, five two-line counter displays. (5) The electric typewriter in front of the five sets of four "set total" decade switches in the C-rack.
^Jagger's at breaking point over code, Henry Fitzherbert, Daily Express, 26 August 2001
^Sale, Tony (2004) , The Colossus Computer 1943–1996 and how it helped to break the German Lorenz cipher in WWII, Cleobury Mortimer: M & M Baldwin, ISBN0 947712 36 4 – A slender (20 page) booklet