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Abacus

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Abacus
1.The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere. Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal. The user of an abacus is called an abacist. 2.The word abacus is Latin. It is taken from the Greek word abax, which means "flat surface." The predecessors to the abacus—counting boards— were just that: flat surfaces.
1. It was used by the Babylonians around 300 b.c.e. 2. The oldest counting board that has been found is called the Salamis Tablet. It was found on the island of Salamis, a Greek island, in 1899. 3. There is evidence that people were using abacuses in ancient Rome (753 b.c.e.–476 c.e.). 4. The first Chinese Abacus was invented around 500 B.C. The abacus, as we know it today, was used in China around 1300 A.D.
1. The abacus first Used in China. 2. The oldest counting board that has been found is called the Salamis Tablet. It was found on the island of Salamis, a Greek island. 3. It was used by the Babylonians and in ancient Rome.
The Abacus is Invented mainly to Perform calculations and Airthmetic Operations.