PC compatible

personal computer that is compatible with IBM PCs

IBM PC compatible computers are those generally similar to the original IBM PC, XT, and AT. Such computers used to be referred to as PC clones, or IBM clones since they almost exactly duplicated all the significant features of the PC, XT, or AT internal design, facilitated by various manufacturers' ability to legally reverse engineer the BIOS through cleanroom design. Columbia Data Products built the first clone of an IBM computer through a cleanroom implementation of its BIOS.
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