Multiple choice

How many vacuum tubes were used in ENIAC?

  1. 15000

  2. 18000

  3. 19000

  4. 21000

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

ENIAC (Electronic Numerical Integrator and Computer), built in 1945, contained approximately 18,000 vacuum tubes. This massive number contributed to its enormous size of about 1,800 square feet and high power consumption of 150 kilowatts.