8-bit computing

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8-bit computing

Refers to CPUs that process 8 bits as a single unit. The first personal computers in the late 1970s, such as the Apple II, Radio Shack TRS-80 and various Z80-based CP/M computers, all used 8-bit CPUs. Personal computers migrated to 16 bits when IBM selected the Intel 8088 CPU for the PC and later to 32 bits with the Intel 386. Today, low-cost 8-bit processors are made by the millions and embedded in myriad devices. See 8088, 386, 16-bit computing and bit specifications.

                  Bytes
      CPU       Processed
  Environment  At one time

    64-bit        8

    32-bit        4

    16-bit        2

     8-bit        1

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