Read more The first calculating machine put into serial production was the Arithmomètre (arithmometer) of the French ...

It couldn’t multiply or divide. He then went into the arithmometer, which is arguably the first commercially successful mechanical calculator with four functions. That was around 1821 or so.

Charles Xavier Thomas de Colmar was a French inventor and entrepreneur renowned for developing, patenting, and manufacturing the Arithmometer. The Arithmometer was the first commercially ...