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POINTING DEVICES
Pointing devices are use to control the position of the cursor on the screen. They included the following:
1: Mouse
2: Pointing Stick
3: Touch Screen
4: Trackball
5: Touch pad
6: light pen
"MOUSE"
A mouse is an input device that looks little bit like a mouse. It has a ball on its underside that is rolled on a flat surface or mouse pad. The rolling movement causes a corresponding movement on the screen. It also has buttons on its top which communicate certain commands to the computer while pressed.
"POINTING STICK"
Pointing stick is a pointing device that looks like a pencil eraser protruding from the keyboard between G, H and B keys. WE move the pointing stick with our forefinger while using the thumb to press buttons located in front of the space bar.
"TOUCH SCREEN"
Touch screen is a video display screen that is sensitized to receive input from simply touching our fingers onto it. It cover with the plastic layer, behind which are invisible beams of infrared light. We simply touch the provided buttons or menus and get the information on the display screen accordingly.
"TRACK BALL"
The track ball is a moveable ball, on top of a stationary device, that is rotated with fingers or palm of the hand. Its popularity surged with the advent of laptop computers where traveling users found themselves without a flat surface to roll the traditional mouse.
"TOUCH PAD"
The touch pad is a small, flat surface over which we slide our finger, using the same movement as we would with a mouse. As we move the finger, the cursor follows the movement. Touch pad's are now common on the portable computer (laptops).
"LIGHT PEN"
The light pen is a light-sensitive stylus, or pen-like device, connected by a wire to the computer terminal. The user brings the pen to a desired point on the display screen and presses the pen button. which identifies that screen location to the computer.
Pointing devices are use to control the position of the cursor on the screen. They included the following:
1: Mouse
2: Pointing Stick
3: Touch Screen
4: Trackball
5: Touch pad
6: light pen
"MOUSE"
A mouse is an input device that looks little bit like a mouse. It has a ball on its underside that is rolled on a flat surface or mouse pad. The rolling movement causes a corresponding movement on the screen. It also has buttons on its top which communicate certain commands to the computer while pressed.
"POINTING STICK"
Pointing stick is a pointing device that looks like a pencil eraser protruding from the keyboard between G, H and B keys. WE move the pointing stick with our forefinger while using the thumb to press buttons located in front of the space bar.
"TOUCH SCREEN"
Touch screen is a video display screen that is sensitized to receive input from simply touching our fingers onto it. It cover with the plastic layer, behind which are invisible beams of infrared light. We simply touch the provided buttons or menus and get the information on the display screen accordingly.
"TRACK BALL"
The track ball is a moveable ball, on top of a stationary device, that is rotated with fingers or palm of the hand. Its popularity surged with the advent of laptop computers where traveling users found themselves without a flat surface to roll the traditional mouse.
"TOUCH PAD"
The touch pad is a small, flat surface over which we slide our finger, using the same movement as we would with a mouse. As we move the finger, the cursor follows the movement. Touch pad's are now common on the portable computer (laptops).
"LIGHT PEN"
The light pen is a light-sensitive stylus, or pen-like device, connected by a wire to the computer terminal. The user brings the pen to a desired point on the display screen and presses the pen button. which identifies that screen location to the computer.
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