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because we can point the icons on the screen with the help of mouse..and we can also select the icons or different grapical objects with the help of this devices
Desktop
You randomly throw the mouse or monitor to the floor.
It can simply be called a "cursor", but you can also call it a "text cursor" to tell it apart from your mouse cursor.
no
if it has a touch screen or a mouse touch pad.
A Screen, a keyboard and a mouse. The keyboard and mouse can be wireless.
a mouse pointer.
An icon is an image representation of a program, a shortcut, or a script. For instance on your desktop those pictures that are on programs, and shortcuts such as My computer are icons. So to wrap it up an icon is an image representation of a program like firefox being a fox on a globe and internet explorer being an E with a yellow circle or even safari being a compass. A mouse pointer is exactly the same as a mouse curser. When you move you mouse don't you see that little arrow the you move on the screen. That's what is referred as a mouse pointer. Where you click programs and links that arrow or somethings a hand on a link is a mouse pointer!
Computer mouse
A mouse with a scroll wheel is used to shift the screen display up or down.
This is because the mouse icon on screen is often an arrow, and in computer jargon the user "points" at a part of the screen. Pointing is done by moving the mouse until the tip of the arrow on screen is at the desired place, such as a menu title.