The monitor is the mjor form of display for a computer. It works by a cable running 
from the monitor to the video card. The system converts signals inot text and pictures 
and is displayed like a tv.

There are many types of monitors ranging in cost and performance:
 -Lcd, these are some of the best types of monitors but cost a lot more
       then a standard  DPI monitor.
 
 -Plasma, these are cost more then the lcd but come in much larger sizes. 

 -DPI, this is the standard monitor and is a lot cheaper then the other two
       bu the quality of the image is a lot worse.