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Chapter Profile
                 Thus, a computer works in three steps:

                                                INPUT   PROCESS   OUTPUT

                 This process is called IPO cycle.

                 Let us look at some examples of IPO cycle.


                                                                  Process






                              Input
                                                                                                    Output











                          Dirty clothes                       Washing Machine                   Clean clothes





                              Input                             Process
                                                                                                 Output












                           Fresh fruits                         Juicer                         Fresh Juice


                 Now, take an example of our human body to understand the same.



                      Input:                                                                            Output:
                   What is 2x2=?                    2x2=4                                             Answer is 4








                                   Input Unit                Processing Unit            Output Unit







                                                                                             Working of a Computer   21
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