Question

Abacus is the first calculating device ​

Answer 1

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$\implies$ Yes, Abacus is the first calculating device.

$\implies$The abacus, also called a counting frame, is a calculating tool that was in use in the ancient Near East, Europe, China, and Russia, centuries before the adoption of the written Arabic numeral system.

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$\implies$Tim Cranmer

Tim CranmerAn 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 so that they do not move inadvertently.

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Answer 2

Answer:

Yes, Abacus is the first calculating device...