4-bit

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Template:N-bit The Intel 4004, the world's first commercially available single-chip microprocessor, was a 4-bit CPU. (However, the F14 CADC was created a year before the 4004. But its existence was classified.) Also, the HP48 Saturn processor (a commonly used scientific calculator) is basically a 4-bit machine, though it strings multiple words together for e.g. its 20-bit memory addressing.

List of 4-bit CPUs

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4-bit Intel CPUs

• Intel 4004
• Intel 4040

External references

• Saturn CPU link

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