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Very good! Each part plays a different
                                                                                   role. Similarly, a computer also has
                                                                                    many parts. Some are outside and
                                                                                  some inside the CPU box. Let us learn
                                                                                              about them.
























                Test Your Knowledge                                                   21 st  Century   #Critical Thinking
                                                                                          Skills
                                                                                              #Technology Literacy
                 Write the missing element of the IPO cycle for the use of the following machines with the
                 help of given hints.


                                             Hints Ready Juice, Cooking and heating




                               MACHINE                        INPUT            PROCESSING            OUTPUT


                                        Microwave         Rice and Water                           Ready to eat



                                                                               Churning and
                                           Juicer        Carrots, Oranges
                                                                              extracting juice





              Now you know that a computer works on the IPO cycle. To follow this IPO cycle it uses

              some devices. Let us learn about them in this chapter.


              INPUT DEVICES


              The devices that are used to give commands or instructions to the computer and tell
              the computer what to do are called input devices. Let us learn about some of them.










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