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Double-action steam engine, Deutsches Museum, Munich

One of the things I like about working with computers is that you almost never have to oil them

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The Frauenkirche dates from the late fifteenth century - it was planned to have an elaborate openwork spire, but they ran out of money and put the pepperpots on in 1525; the Neues Rathaus dates from 1909 but was clearly designed to fit in with the late fifteenth century.