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GPIB
General Purpose Interface Bus (GPIB) specification / From Wikipedia, the free encyclopedia
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IEEE 488, also known as HP-IB (Hewlett-Packard Interface Bus) and generically as GPIB (General Purpose Interface Bus), is a short-range digital communications 8-bit parallel multi-master interface bus specification developed by Hewlett-Packard. It subsequently became the subject of several standards.
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Although the bus was created in the late 1960s to connect together automated test equipment, it also had some success during the 1970s and 1980s as a peripheral bus for early microcomputers, notably the Commodore PET. Newer standards have largely replaced IEEE 488 for computer use, but it is still used by test equipment.