The Arithmometer (1 янв 1820 г. – 31 дек 1820 г.)
Описание:
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.Добавлено на ленту времени:
Дата:
1 янв 1820 г.
31 дек 1820 г.
~ 12 months