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CPU stands for central processing unit. Overall a personal computer can be divided into the following major parts from point of view of functions performed:

1. Input devices (keyboard, mouse)

2. Output devices (monitor which displays the output or results of work being done on the computer)

3. CPU (central processing unit, which is the brain of the computer which does all the processing and calculations on data inputs and provides output on screen or printer)

4. Storage devices (memories, hard disk which store data).

Many times in common language the CPU term is used for the computer box unit which contains motherboard, processor, hard disk, CD/DVD and floppy drives. This is the box to which we connect monitor, keyboard, mouse and printer through cables. In technical terms the term CPU is used only for the processor, which fits on the motherboard.

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16y ago

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