ABACUS is -
- A hand operated calculating tool
- খA database management system
- গA programming language
- ঘAn antivirus Software
সঠিক উত্তর: ক
সমাধান
Correct Answer: A hand operated calculating tool.
The abacus is a mechanical device used to assist a person in performing mathematical calculations. It is operated entirely by hand by moving beads along rods or wires.
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