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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. The instructions and programs

                    that enable a computer to perform tasks 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

                 Input devices allow a computer to receive data and instructions from the user. Data
                 can be in the form of numbers, text, sound or graphics.


                                                                               The Computer— An Overview          7
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