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The functioning of a CPU can be demonstrated with the help of the following block

                 diagram:



                                                            Arithmetic
                               INPUT Unit                                              OUTPUT Unit
                                                            Logic Unit





                                                          Control Unit






                                                          Memory Unit


                                                               CPU

                 Arithmetic Logic Unit (ALU)


                 The ALU (Arithmetic Logic Unit) performs arithmetic operations such as addition,
                 subtraction, multiplication, and division. It also handles logical comparisons, such
                 as checking whether values are greater than, less than, or equal to one another.

                 Control Unit (CU)

                 The CU (Control Unit) manages coordination  among all parts of the  CPU. It

                 receives data and instructions from the memory unit and directs them to the ALU
                 (Arithmetic Logic Unit) in a sequential manner.
                 Memory Unit (MU)


                 The MU (Memory Unit) holds the data and instructions provided to the computer,
                 along with the results of any processing.

                 Output Devices

                 A computer  displays the  results of processed  data  through  output devices.
                 Examples of output devices are the monitor, printer, speakers and projector.




















                                                                                           A Computer System      9
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