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It is well known in computer science that the words ' com puter ' and ' processor ' are used interchangeably. Speaking more precisely, ' computer * refers to the central processing unit (CPU) together with an internal memory. The internal memory, con-trol and processing components make up the heart of the com-puter system. Manufactures design the CPU to control and carry out basic instructions for their particular computer.
The CPU coordinates all the activities of the various com ponents of the computer. It determines which operations should be carried out and in what order. The CPU controls the opera ¬ tion of the entire system by issueing commands to other parts of the system and by acting on responses. When required, it reads information from the memory, interprets the instructions, performs operations on the data according to the instructions, writes the results back into the memory and moves information between memory levels or through the input-output ports.
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