Which among the following generations of computer used the technology of **transistors** for the first time?

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**Solution:**

1. The **first generation** of computers used **vacuum tubes** as the main technology for circuitry and memory.

2. The **second generation** of computers, which appeared in the late 1950s and early 1960s, introduced the use of **transistors** instead of vacuum tubes.

3. Transistors were significantly smaller, faster, cheaper, and more energy-efficient, making computers more reliable and compact.

4. The **third generation** used integrated circuits, and the **fourth generation** used microprocessors.

**Answer:** The technology of transistors was first used in the **second generation** of computers.

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