B
background noise The sound, typically a faint hiss, heard from an audio system or radio receiver in the absence of a signal.
background processing or task In a multitasking computer system, the execution of a low-priority task in the intervals when the processor can be spared from current high-priority tasks. Tasks such as printing and disk formatting are often executed as background tasks.
backing store Same as bulk storage.
backplane A flat panel usually incorporating an earthed plate which is located at the rear of a multiboard equipment and supports the wiring and the receptacles which locate with the edge connectors on the printed-circuit or printed-wiring boards.
back porch In a television signal the period of blanking level immediately ...
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