4-bit
Encyclopedia : 4 : 4B : 4BI : 4-bit
In computer architecture, 4-bit integers, memory addresses, or other data units are those that are at most 4 bits wide. Also, 4-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.
N-bit Processors
4-bit
8-bit
16-bit
24-bit
31-bit
32-bit
48-bit
64-bit
128-bit
N-bit Applications
16-bit
31-bit
32-bit
64-bit
N-bit Data Sizes
4-bit
8-bit
16-bit
32-bit
64-bit
128-bit
nibble byte octet word dword qword
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
4-bit Intel CPUs
External references
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