Store and mill

Charles Babbage, inventor of the Analytical Engine – a machine for performing complex calculations that existed only on paper in his lifetime – split the concept of the machine into two functions.

STORE – the “store” was essentially memory, stored on punchcards as seen in the above image.
MILL – the “mill” did the actual computational work; in Babbage’s machine this was done with gears and levers.

Many more details on the history of Babbage’s invention in James Gleick’s book “The Information“.

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