Arithmometer
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The arithmometer was the first digital mechanical calculator strong and reliable enough to be used daily in an office environment. This calculator could add and subtract two numbers directly and perfo
Arithmomètre built by Louis Payen around 1887
Detail of an arithmometer built before 1851. The one-digit multiplier cursor (ivory top) is the leftmost cursor
One of the first machines with a unique serial number (10-digit machines with serial numbers from 500 to 549) built around 1863
Front panel of a Thomas arithmometer with its movable result carriage extended
Mechanical calculator
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A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or a simulation like an analog computer or a slide rule. Most
Arithmometer
…The arithmometer (French: arithmomètre) was the first digital mechanical calculator strong and reliable enough to be used daily in an office environment. This calculator could add and subtract two numbers directly and perform long…
Four of Pascal's calculators and one machine built by Lépine in 1725, Musée des Arts et Métiers
Replica of Schickard´s calculator
Detail of a replica of an 18th-century calculating machine, designed and built by German Johann-Helfrich Müller.
A mechanical calculator from Anton Braun, dated 1727