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linked calculator, minor edit (calculators already existed, but could not do complicated operations)
Amédée Mannheim (1831-1906) was a French mathematician who invented the modern form of the slide rule, which was the common method for performing complex arithmetic calculations until the invention of the calculator.
Amédée Mannheim (1831-1906) was a French mathematician who invented the modern form of the slide rule, which was the common method for performing complex arithmetic calculations until the invention of the electronic [[calculator]].