CPU (Central Processing Unit)

The cpu is the component of a computer with circuitry to control the interpretation and execution of instructions. It performs the process part of  INPUT-PROCESS-OUTPUT cycle.
In microcomputer, the components of the cpu are mounted on the main circuit board, called the motherboard. A microprocessor chip contains the circuit and special storage locations called registers - needed to perform the arithmetic-logic and control functions.
                   
                                         The various components on the main circuit board of the personal computer processor unit are linked together by sets of parallel electrical conducting lined called buses. Different collections of these internal bus lines are used for different purpose and are given different names. These internal buses also provide an electrical interconnection between processor components and the interface devices used with peripheral equipment.                                                                                                                                            
                                            

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