Question

what is abacus? please answer ​

Answer 1

Answer:

The abacus (plural abaci or abacuses), 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. The exact origin of the abacus is still unknown.

Answer 2

Answer:

Abacus is the most prominent computing device first used in early human civilization and later perfected in chine