Math Logic

Question :
What is an Arithmometer ?

Answer :
It is a computing machine.
Arithmometer was designed by Charles Xavier Thomas de Colmar in 1820.
Arithmometer is made of brass, steel, and wood and is fitted with a leather case suitable for desktop use. Pulling an attached ribbon rotated several drums, each of which turned a gear connected to a digital counter.
The arithmometer designed by Baldwin (patented 1875), could add, subtract, multiply, and divide. Economic conditions, however, prevented its immediate manufacture.
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