2h 52min, jan 2, 232 y BC - Ababacus
Description:
The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hindu–Arabic numeral system. The exact origin of the abacus is still unknownAdded to timeline:
Date:
2h 52min, jan 2, 232 y BC
Now
~ 2260 years ago