Computers built before the First Generation of computers were:
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Answer: B) Electro-mechanical
Electro-mechanical
Why?
✓ Mechanical: Early calculating machines operated mainly through gears, wheels, and other mechanical parts.
✓ Electro-mechanical: Machines such as the Harvard Mark I used electrical components and mechanical relays before fully electronic computers became common.
✓ First-generation computers: Used vacuum tubes, such as ENIAC.
Source: Scan #36 page 8 Q377