Later Developments: (Abacus, Calculator, etc)

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Use the Abacus to solve different arithmetic problems.

Calculator
In IT terms, a 'calculator' is a device or software program that performs mathematical operations or computations.

Abacus
In terms of Information Technology, 'Abacus' is not directly related, but it is often seen as the origin of computers, being a simple, manual device used for calculations.