The Abacus (jan 24, 2500 BC – dec 24, 2500 BC)
Description:
The abacus is believed to be created in Sumeria. This is also believed to be one of the oldest computation devices. The abacus is used to add and subtract numbers. It uses columns of beads/pebbles/shells which can be manipulated by the user to make their calculations.Added to timeline:
Date:
jan 24, 2500 BC
dec 24, 2500 BC
~ 11 months