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1. Which one of the following is the first calculating device?
- A. Differential engine
- B. Differential engine
- C. Differential engine
- D. Differential engine
Answer: Option B
Explanation:
The earliest recorded calculating device is the abacus. Used as a simple computing device for performing arithmetic, the abacus most likely appeared first in Babylonia (now Iraq) over 5000 years ago.
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