The Sumerian abacus appeared in 2700 BC, a primitive device which was difficult to use. The Persians used the abacus in 600 BC. The Greek abacus dated to the 5th Century BC. The Chinese dated to the 2nd Century BC
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The Chinese abacus
Abacus was invented by the Chinesethe abacus was also known as the first computer
the abacus is made by the Egyptian in Egypt.
The abacus was originated in China in 3000 B.C.(:
Asiana Abacus was created in 1991.