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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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