The Arithmometer (1 janv. 1820 – 31 déc. 1820)
Description:
The arithmometer was invented by Thomas de Colmar. It was the first mechanical calculator. It used rotating drum to perform calculations. This device kicked off the start of the mechanical calculator industry.Ajouté au bande de temps:
Date:
1 janv. 1820
31 déc. 1820
~ 12 months