Mechanical computer
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A mechanical computer is a computer built from mechanical components such as levers and gears rather than electronic components. The most common examples are adding machines and mechanical counters, w
Hamman Manus R mechanical computer, produced in Germany by the DeTeWe company between 1953 and 1959
Curta Calculator
Harwell Dekatron
Computer
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A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations. Modern digital electronic computers can perform generic sets of operations know
Mechanical computer
…A mechanical computer is a computer built from mechanical components such as levers and gears rather than electronic components. The most common examples are adding machines and mechanical…
A human computer, with microscope and calculator, 1952
The Ishango bone, a bone tool dating back to prehistoric Africa
Charles Babbage
A diagram of a portion of Babbage's Difference engine