Monitors are also measured by their precision. There are two main measures, Dot Pitch, and DPI.
Dot pitch is a measure of the size of each tiny dot the monitor can display. The smaller each dot is, the nicer the picture will look, but the more expensive the monitor will be. When discussing Dot Pitch, SMALLER IS BETTER!!
DPI stands for Dots Per Inch. As you can guess, the smaller the dot pitch rating for a monitor is, the more of those tiny dots you could squeeze into a square inch. If you are considering DPI, LARGER IS BETTER.
Computer sales people are not above taking advantage of this confusion.