Multiple choice

The earliest known computer to man is the

  1. Mark I

  2. IBM-753

  3. Abacus

  4. Mac

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

The Abacus, dating back to around 2400 BC in Mesopotamia, is widely considered the earliest known computing device used for arithmetic calculations. Mark I (1937), IBM-753 (modern), and Mac (1980s) are all much more recent inventions.