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Pointing: Pointing means sliding the mouse until the tip of the pointer

reaches at the desired option. It is used to highlight any thing on the screen.

Mouse Actions

Left Click: It is used to select an item.
Double Click: It is used to start a program or open a file/folder.

Right Click: It is usually used to display a set of commands.

Drag and Drop: Using the left button, we can move an object. Keep the left
button pressed and drag the mouse to move the object to the place where

you want to place it. This process is known as drag and drop .

Scrolling Button: The scrolling button is used to scroll up or down for making
the contents visible on screen because everything cannot be displayed at a

time on the screen.

Types of Mouse

Mechanical Mouse: A mechanical mouse has a rubber or metal ball on its

underside and it can roll in every direction. There are sensors within the
mouse, which are mechanical, detect the direction in which the ball is moving

and moves the pointer on the screen in the same direction. A mouse pad

should be used under the mouse to run on.

Optical Mouse: An optical mouse is the subsequent development in the
evolution of the technology. The rolling balls and wheels are eliminated in
this version. The beam of light emits from the device which activates the

mouse to offer direction and speed to the cursor. There is no mechanical part

in this type of mouse and therefore the question of interference by dust does
not arise.

Optomechanical Mouse: An optomechanical mouse is a combination of the

optical and the mechanical technologies. It uses a ball but detects the mouse

movement optically. It is now the most commonly used with PC.

Keyboard

The keyboard is an input device. It is used to type or enter data in the
computer. It looks like a typewriter. This device is made up of different types

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