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Step 5  Switch off the UPS button.

                 Step 6  Turn off the main power supply.
                 Clickipedia




                    Normal mode is the default working mode of a computer system, whereas, safe
                    mode is a diagnostic mode, which is used to detect issues of the computer system.



                   Reb             t


                        Windows 10 is an operating system developed by Microsoft Corporation.

                        Desktop is the first screen that appears after switching on the computer.
                        Icons are the small pictures which represent different programs, files/folders
                      on the desktop.

                        A long bar at the bottom of the desktop is called the taskbar.
                        Sorting the icons means arranging the icons on the desktop.

                        You can change the desktop background and Screen saver according to your
                      choice.
                        The shape of the mouse pointer changes according to the action we perform.
                        Before starting work on the computer, you should start your computer properly.

                        You should shut down Windows before switching off your computer.




                  One Touch            Learn                                              Section A (Objective)
                  One


                 A.  Tick (3) the correct option.
                     1.  ................................ help to quickly open files or folders by double-clicking them.


                        a. Taskbar                      b. Icons                       c. Gadgets

                     2.  There are ................................ types of operating systems.

                        a. two                          b. one                         c. three


                     3.   ................................ mouse pointer is used for pointing and selecting.

                        a. Busy                         b. Normal                      c. I Beam

                     4.  A long bar at the bottom of the desktop is called the ................................ .


                        a. clock                        b. taskbar                     c. start button



                                                                         GUI Operating System—An Introduction      27
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