The Abacus was first used for computations in 3000 B.C. The Abacus is a portable device that consists of beads strung on wires or wooderns rods. By using this device, people can rapidly and accurately add, subtract, multiply or divide.
The Abacus has two parts divided by midbar. The part above the midbar is called 'Heaven' and each bead in the heaven has a value equal to 5 and parts below the midbar is known as 'Earth' . Each beads on the earth . It has a value equal to 1 beads are brought near the midbar.
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