What is a mouse ?
Mouse is the most widely used pointing device .It is a small and lightweight
input device .Mouse is moved on a flat surface to control the movement of the
cursor or
pointer on a screen.It is attached to the computer by a cable or wireless
connection.
.Mouse is very easy to use .It is mostly used in graphics application
Buttons of mouse?
A mouse usually has two or three buttons .These buttons are used to
perform different tasks. It may also include a scroll through long document.
the mouse contains a small ball at the bottom. The movement of the cursor depends on movement of ball.
What is track ball ?
A trackball can be used as an alternative to a mouse.This device has
buttons similar to those on mouse . It has a large rotating ball on the top.the body of the of the track ball is not moved .The ball is rolled with fingers.The position
of the cursor on the screen is controlled by rotating the ball.
Advantage of track ball?
1st
An advantage of the trackball is that it takes less space to move than
mouse. Trackball is often included in laptop .
2nd
It can also be used as separate input devices with standard desktop
computer.
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