What Is an Abacus | Mastermindabacus.com

 Searching for what is an abacus? Visit Mastermindabacus.com to know what is an abacus. It is the most basic type of counting or calculating gadget. The exact origin of the abacus is unknown. It was most likely invented between 300 and 500 BC. For more info, visit our site.


What is an Abacus

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