In 1982, Nick Tredennick Tred82 described his view of the universe of microprogramming. He divided it into four "cultures:" Commercial Machine Culture The developers of general purpose computer families. Bit-Slice Culture The developers of specialized systems built with standard bit-slice components. Microprogrammable Machine Culture The developers of systems that can emulate several computer architectures. Single-Chip Culture The developers of microprocessors who use microprogramming as an implementation technique.
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