{{title|Microprocessor (MPU)}} A '''microprocessor''' ('''µP''') or a '''Microprocessing Unit''' ('''MPU''') is a device that

...), source (S) and drain (D) terminals. The gate is separated from the body by an [[gate oxide|insulating layer]] (pink).]] ...or [[amplifier|amplifying]] or switching [[signal (electrical engineering)|electronic signals]].