MONITOR Monitor is the device of a visual data representation. This is main output device. The monitor has a screen that displays information, such as instructions you send to your computer and the information and results your computer sends back after interpreting your instructions. The screen may display information in one color or in several colors.
A color monitor won’t display color unless you have the appropriate video card. A video card fits inside your computer and determines the screen resolution and number of colors your monitor can display. Some video cards enable your monitor to display graphical information, such as geometric designs, in addition to text and numbers.