Allan G. Bromley
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Allan George Bromley was an Australian historian of computing who became a world authority on many aspects of early computing and was one of the most avid collectors of mechanical calculators.
Replica of the Difference Engine in the Science Museum, reconstructed after studies of Charles Babbage's original drawings by Allan Bromley.
Antikythera mechanism built by Allan Bromley and Frank Percival.
Analytical engine
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The analytical engine was a proposed digital mechanical general-purpose computer designed by the English mathematician and computer pioneer Charles Babbage. It was first described in 1837 as the succe
Allan G. Bromley
…p.2 Part of Allan Bromley's scholarship was his study, at the Science Museum library in London, of the original drawings for the Difference Engine and Analytical Engine designed by Charles Babbage more than a century earlier. These studies and the most detailed analysis and interpretation led to the reconstruction of…
Printing mechanism from Babbage's analytical engine, as displayed at the Science Museum, London
Two types of punched cards used to program the machine. Foreground: 'operational cards', for inputting instructions; background: 'variable cards', for inputting data
Henry Babbage's analytical engine mill, built in 1910, in the Science Museum (London)
Plan diagram of the analytical engine from 1840