This biographical source details the life and career of Allen "Doc" Coombs, a prominent British electronics engineer and a pioneer in the field of early computing. After earning his doctorate, Coombs spent decades at the Post Office Research Station, where he played a vital role in developing the Colossus computer for wartime codebreaking. Beyond his military contributions, the text highlights his work on the MOSAIC computer and his advancements in optical character recognition for postal systems. He was also recognized for his academic lectures on pattern recognition and his leadership within the scientific community until his retirement. The document concludes by noting his lasting legacy as a computer science pioneer following his death in 1995.