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WORKING OF A COMPUTER


                 As we have discussed earlier, a computer can do a lot of things. Let us understand

                 how a computer works.
                 A computer works in three steps: Input                Process       Output (IPO). This is also

                 called the IPO cycle.

                                   Input                     Process                     Output


                 INPUT


                 We enter data and instructions into the computer which is called input. The devices
                 which are used to send input to a computer are called input devices.


                 PROCESS

                 A computer works on data (input) to produce meaningful information with the help of
                 processing device known as the CPU (Central Processing Unit). This conversion of

                 data into information is called processing. CPU is also called the brain of a computer.

                 OUTPUT

                 The result received after processing is called output. The devices which are used to

                 display the results are called output devices.










                         Input Device                     Processing Device                    Output Device




                           PARTS OF A COMPUTER


                 The computer system is made up of two parts—Hardware and

                 Software. Let’s learn about hardware and software in detail.



                           HARDWARE


                 The term ‘hardware’ refers to the parts of a computer that we can see and touch.

                 In other words, hardware are the tangible parts of a computer system.


                                                                                            Hardware and Software  9
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