You click on an icon and a window opens .
you click a file to install a program
you
You click an icon and a programs starts.
You click on a file to open it and OS presents you options as to which application you want to use to work/play/open that file.
You click shutdown button and OS gets shut.
You click an icon and the user is logged off .
You click an icon and OS gives you option to switch the OS user.
Someone requests you to add a user and you create a user this process is event driven.
Now I have given you a framework run with it and start writing your paper.
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Most engines rotate clockwise when viewed from the front or opposite side of the transmission.
Camber angle is the angle between the vertical axis of wheel and the vertical axis of the car/vehicle when viewed from the front or rear.
Gyroscope (mechanism) is used to determine the effect of a turn taken by an aeroplane. In a short let me describe them, 1. If the rotation of a propeller/ rotor is in CLOCKWISE when viewed from REAR/ BACK SIDE and the aeroplane takes a LEFT TURN, then reactive gyroscopic couple (which is equal in magnitude and opposite in direction of active gyroscopic couple) will tend to RAISE THE NOSE and DIP THE TAIL. 2. If the above similar conditions are considered when the plane is taking a RIGHT TURN, then the reactive gyroscopic couple will tend to RAISE THE TAIL & DIP THE NOSE. 3. If the rotation of a propeller is in ANTI-CLOCKWISE DIRECTION when viewed from REAR of the aeroplane and the plane takes a LEFT TURN, the reactive gyroscopic couple tend to RAISE THE TAIL & DIP THE NOSE. 4. If we consider the similar conditions of (3), and a plane takes a RIGHT TURN, then the reactive gyroscopic couple tends to RAISE THE NOSE & DIP THE TAIL. To remember it easily, you can use RIGHT HAND SCREW RULE.