An Acronym for Liquid Crystal Display.
Commonly known as "flat screens". Laptop monitors are LCDs.
LCDs use significantly less power than a traditional CRT monitor. If you are using one, you should probably make sure you are taking advantage of AntiAliasedFonts. Because they have a lower refresh rate and more stable image, LCDs are scorned by FirstPersonShooter gamers and beloved of those who must spend long hours reading on their computer.