Summary

Computer monitors use either cathode ray tubes (CRTs) or liquid crystal displays (LCDs) to display the output of a computer's graphics controller on a screen. CRTs were the most common type of monitor for many years, and millions are still in use, but LCDs have almost completely replaced them in the marketplace. Other flat-panel technologies, including plasma, electroluminescent (EL), and digital light processing (DLP) are also available, but they're mostly used in specialized applications.

LCD monitors have many advantages over the older CRT technology: they occupy less space and weigh less, and the images don't flicker at slow refresh rates. However, CRT monitors are still superior for graphic design and other applications that require accurate color displays.

When you can, the best way to evaluate monitors is to compare the images on their screens in person. If that's not possible, their published specifications can often provide useful information.