An abacus is a mechanical tool that is used to count the numbers. It was originally made up of wood that has several beads that moves up and down through strings or sticks in the frame.
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The Chinese abacus
Abacus was invented by the Chinesethe abacus was also known as the first computer
The abacus was originated in China in 3000 B.C.(:
Asiana Abacus was created in 1991.
the abacus is made by the Egyptian in Egypt.