🛠️ Invention or technique

Atanasoff–Berry Computer

Atanasoff-Berry Computer

Date
1942 · confidence high
Place
Ames, Iowa, United States
Credited to
John Vincent Atanasoff and Clifford Berry
Field
Knowledge & symbols

⚠️ Disputed: the sources disagree.

What it is

The first automatic electronic digital computer, a pioneer in using vacuum tubes to perform arithmetic calculations faster; it was neither programmable nor Turing-complete.

Its historical priority is debated among computing historians, precisely because it was neither programmable nor Turing-complete.

What it led to

  • The first electronic arithmetic logic unit, now integrated into every processor
  • A technical precedent cited in patent disputes over the ENIAC

Links

Sources✓ verified 2026-09-28