A. First
B. Fifth
C. Third
D. None of these
🧠 Explanation:
Vacuum tubes were used in first-generation computers (1940s-1950s), powering early machines. This technology is a key topic in computer history, engaging students and tech enthusiasts. Understanding vacuum tubes clarifies computing’s evolution, relevant for studying modern technology’s roots. Their role attracts those exploring early electronics, highlighting their impact on developing computers that shaped today’s digital landscape, from PCs to smartphones.
