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THE COMPUTER— AN OVERVIEW
               01















                                 Your Aim

                                 to learn about:
                                    l  Working of a Computer           l  Input Devices

                                      l  Processing Device               l  Output Devices



            As you know that a computer system is made up of two types of parts— Hardware
            and Software.

                The parts of a computer that we can see and touch are called Hardware.

                 A computer needs instructions to do anything. These step-wise instructions are
               called software.

                WORKING OF A COMPUTER


            A computer works on the IPO (Input-Process-Output) cycle. It receives input from
            the user through input devices, processes the input using the CPU and gives back
            the output using output devices. This process is known as IPO cycle.














                     Input devices                    Processing device                  Output devices
                                                         IPO Cycle


                INPUT DEVICES

            A computer accepts data and instructions from you through input devices. Data can
            be in the form of numbers, text, sound or graphics.


                                                                          The Computer— An Overview           7
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