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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....Historycircuit boardcomputermemoryconstitutesperipheralinput/output devicesauxiliaryintegrated circuitchipmicroprocessorarithmetic logic unitcontrol unitmicroprocessorIntel 8080Intel 8088CUNY Pressbooks Network - Learner - What Is a CompanyÃâs CPU and How Does it Work? 5 Things to KnowSee all related contentcontrol unitintegratesarithmetic-logic unitarithmeticlogicalternativecriteriaThe Editors of Encyclopaedia BritannicaErik Gregersen
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- Central processing unit (CPU), computer system, generally composed of the main memory, control unit, and arithmetic-logic unit. It constitutes the physical heart of the entire computer system; to it is linked various peripheral equipment, including input/output devices and auxiliary storage units.