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Who invented the Abacus?

the sumerians probably invented the abacus
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Who is the inventor of (has invented) Abacus, the global distribution system (GDS) with a primary focus on Asia/Pacific travel operated by Abacus International Pte, Ltd., which is headquartered in Singapore?
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Abacus is a Latin word that has its origins in the Greek words abax or abakon (meaning "table" or "tablet") which in turn, possibly originated from the Semitic word abq ...
Invention Question: Who Invented The Abacus? The abacus is really created by Mo Ti in China. He made it accidentally somehow.... It was created in 578 B.C.E during the Si dynasty.
While the abacus in one form or another has been around for thousands of years, the abacus that we know of today first appeared around 1200 A.D. in China.
An adapted abacus, invented by Tim Cranmer, called a Cranmer abacus is still commonly used by individuals who are blind. A piece of soft fabric or rubber is placed behind the beads ...
What did the first counting board look like? The earliest counting boards are forever lost because of the perishable materials used in their construction.

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