Information Technology Tools and Network Basis : Introduction to Computer

सबसे पुराना गणना करने वाले उपकरण हैं , The earliest calculating devices are

The earliest calculating devices are

A. Abacus


Abacus, plural abaci or abacuses, calculating device, probably of Babylonian origin, that was long important in commerce. It is the ancestor of the modern calculating machine and computer.

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