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    IN SCIENCE AND DEFENCE

                     We use computers in science and defence for the following tasks:

                         Research

                         New scientific inventions

                         Designing robots

                         Weather forecasting

                         Launching and controlling satellites,
                       rockets, and missiles

                                                                    AT POLICE STATIONS

                                                                    We use computers at police stations for
                                                                    the following tasks:

                                                                        Maintaining criminal records

                                                                        Recording fingerprints of suspects

                                                                        Tracking criminals

                                                                                            21 st
                                                                                         Century   #Flexibility
                         Computers need energy to                                          Skills
                           work, just like trees need                “We should not become too
                                sunlight to grow.                    dependent on a computer.”

                                        Think of a machine that doesn’t exist yet. Draw it in your notebook
                                        and write any one of its use.

                            Hashtag

                          #Touchscreen: A screen that can be operated using fingertips
                          #Robots: A smart machine designed to help humans

                                                                                           Computer—A Smart Machine   13

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