output devices 
Electronic devices used to view or print the results of data processing done on a computer.
Device with a cathode ray surface that displays computer-generated graphics and texts visually.
Button that adjusts the position of the image on the screen.
Button that adjusts the width of the image.
Button that adjusts the height of the image.
Mechanical device that turns the monitor on or off.
Button that increases or decreases the contrast between the light and dark parts of an image.
Signal light indicating that the screen is on.
Button that adjusts the black and white part of an image.