jan 1, 2000 BC - Abacus - Ancient calculator, still in use.
Description:
The abacus is a computing device invented about 4,000 years ago. People who are well-trained to use it can perform calculations remarkably quickly, including square roots and cube roots on multi-digit numbers. In some countries, the abacus is still widely used today.
The computation algorithms are executed by the user, not the device.
Added to timeline:
History of Computers
Date:
