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In simple terms, the monitor, sometimes also called a CRT after the main technology used in making them, is a specialized, high-resolution screen, similar to a high-quality television. Many times per second, your video card sends the contents of its video memory out to your monitor. The screen is made up of a matrix of red, green and blue dots. The information your video card sends controls which dots are lit up and how bright they are, which determines the picture you see.
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