The mechanical calculator (7 ч 50 мин, 18 ноя 2018 г. – 20 ч 53 мин, 30 июл 2019 г.)
Описание:
The mechanical calculator then invented by Thomas de Colmar in the mid-nineteenth century, and subsequent others. It was called the Arithmometer. The concept was improved with pinwheel calculators invented by Baldwin and Odhner.Добавлено на ленту времени:
Дата:
7 ч 50 мин, 18 ноя 2018 г.
20 ч 53 мин, 30 июл 2019 г.
~ 8 months
