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    HOW A COMPUTER WORKS?

                     You know that a computer cannot function on its own. It needs instructions to
                     work. Let us observe how the IPO cycle works in daily life.

                     WASHING CLOTHES IN A WASHING MACHINE

                     In  this example, dirty clothes and washing powder are the inputs. We are
                     washing clothes as a set of processes. So, washing clothes is the process. We

                     get clean clothes as the output.

                         dirty clothes and washing               washing the clothes                clean clothes
                                                                    Process
                               powder (Input)                          (Process)                      (Output)

                     CALCULATING NUMBERS

                     If we are asked to add the numbers 10 and 5.

                                                     10           5          +      =    ?

                     To add these numbers, we will use our brain to think and calculate.

                                    10,5,+                          10 + 5                             15

                                     Input                         Process                          Output

                     After calculating,  we’ll  find  that  the  answer  is  15.  Similarly, we give
                     instructions to the computer and then the computer works on them to give

                     us the result.

                                                                                                 Operating a Computer  23

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