The Abacus
The Chinese introduce the abacus. It was used in China for calculating the census as recently as A.D 1982.
Euclid’s Elements Book
Euclid’s Elements summarizes all the mathematical knowledge of the Greek. It is used for the next 2,000 years.
The Astrolabe
The astrolabe is an elaborate analog calculator, historically used by astronomers and navigators to measure the inclined position in the sky of a celestial body, day or night. An early astrolabe was invented in the Hellenistic civilization by Apollonius of Perga between 220 and 150 BC. Astrolabes were further developed in the medieval Islamic world, where Muslim astronomers introduced angular scales to the design, adding circles indicating azimuths on the horizon. It was widely used throughout the Muslim world, chiefly as an aid to navigation and as a way of finding the Qibla, the direction of Mecca. Eighth-century mathematician Muhammad al-Fazari..Read More
The Antikythera Mechanism
The Antikythera mechanism is an ancient Greek analogue computer used to predict astronomical positions and eclipses for calendar and astrological purposes decades in advance. The Antikythera mechanism is generally referred to as the first known analogue computer. Credit: Wikipedia