The first Abacus (plural Abaci) are believed to have come from Mesopotamia circa 2700 BC.
the Chinese abacus, called a suànpándates to around the 2nd cenruary BC and is beleived to be a copy of the Roman abacus from around the 1st centuary BC.
The Roman one was thought to be a stolen, and improved Persian abacus and the Persians believe to have copied the Egyptian one.
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How did the abacus occur?
the abacus replaced the abaci
Charles Babbage developed abacus in 1820 for information send email to sahil2828@gmail.com
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the abacus is made by the Egyptian in Egypt.
The abacus has been around for millennia, in various countries. No record of the inventor was made.
It was made in 1815
For a calculater
Originally in China.
The abacus first appeared around the period 2700-2300 BC in Sumeria.
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The Chinese abacus.
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actient china