A computing tool refers to an instrument used for computing or an object that assists in computing.

Since the birth of mathematics, people have been looking for tools that can facilitate and speed up calculation. Therefore, calculation and calculation tools are closely related.

Finger counting is the most convenient calculation tool. Children always pull their fingers when they learn to calculate, and adults often stretch out their fingers when they say numbers. In ancient China, there was a saying of "counting by pinching fingers", which was still popular in Europe until the 5th century. In some modern places, people still use their fingers for simple calculations, which shows that fingers have long been used as calculation tools.

Ancient computing tool 1900, divers found a bronze ware with a gear and dial near the ancient island of Tila, which was used by the ancient Greeks to calculate the movement of celestial bodies around 65 BC. Pompeii, Italy, was annihilated by volcanic magma in 79 AD, and it was not revealed to the world until the 20th century, and the scale of the Roman era was found in the ruins. These are objects of ancient computing tools.