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November 1971General sourceWell documented

Intel 4004: the microprocessor

On the timeline · around November 1971 · Intel 4004: the microprocessor1966196819701972197419761978

What happened

Intel released the 4004, the first commercial computer-on-a-chip, built for a Japanese calculator.

Why it matters

A CPU you could hold — the component that made personal computers inevitable.

Sources