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Input and Output



                      Devices
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                         Learning Outcomes


                             IPO Devices                                        Input Devices


                             Processing Device                                  Output Devices

                             Storage Devices


                 In this chapter,  we’re going to learn  about  various devices that  help us use
                 computers. Let’s start by understanding what each one does.


                  i +  IPO DEVICES

                 A computer is made up of many parts. These parts are also known as IPO devices.



                  i +  INPUT DEVICES
                 The devices that are used to enter data into the computer and give instuctions are
                 called input devices. Some of the commonly used input devices are:


                 Keyboard
                 A keyboard is  an input device that is  used to give
                 instructions to the computer by typing text and numbers.
                 It has buttons called keys.
                                                                                                 Keyboard
                                Mouse

                                A mouse is an input device that sends instructions to the computer
                                with the click of a button. It is used to draw pictures and for selecting
                   Mouse        objects on the computer.

                 Scanner

                 A scanner  is  an input device that  is  used to convert  documents
                 or images from paper to the computer. It works like a photocopy

                 machine.                                                                                 Scanner


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                                                                                       Input and Output Devices
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