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A calculating machine is a machine designed to come up with calculations (i.e. computations); the most famous is probably the Victorian British scientist Charles Babbage's Difference Engine (No. 2), designed in the 1840s but never completed in the inventor's lifetime
Calculating machines shouldn't be confused with adding machines, which are for solving sums.
( A working Difference Engine based on Babbage's original specifications, using only materials available during the mid-19th century, was built at the London Science Museum in the late 1990s.)
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See also
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Patents
— Calculating machine — W. S. Burroughs
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