4-BIT

The Intel 4004, the world's first commercially available single-chip microprocessor, was a 4-bit CPU. (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, e.g. its 20-bit memory addressing.

Contents

List of 4-bit CPUs

4-bit Intel CPUs

External references

List of 4-bit CPUs

4-bit Intel CPUs

★ Intel 4004

★ Intel 4040

External references

★ Saturn CPU link