It was not a Turing-complete computer, even though Alan Turing was at Bletchley Park. This idea had not yet been thought of, and most of the other early modern computing machines were not Turing-complete (like: the Atanasoff–Berry Computer, the Harvard Mark I electro-mechanical relay machine, the Bell Labs relay machines by George Stibitz and others, or the first plans of Konrad Zuse). It took a long time for computers be used for many uses, instead of just a calculator only for working out one hard problem.