1 janv. 1300 - Abacus
Description:
The abacus was a calculating device also made by the Chinese. The Abacus consists of beads or disks that can be moved up and down on a series of sticks or strings within a usually wooden frame. Abacus isn't a self calculating device, it is simply just a tool to help. In general, its a tool to help with calculating.Ajouté au bande de temps:
Date:
1 janv. 1300
Maintenaint
~ Il y a 726 ans