Up-and-over and sectional doors

There are two kinds of garage doors common on the market today.

Up-and-over models consist of a single panel door that pivots out and up, sliding in a single section along the ceiling of your garage. They are available in a stunning number of designs, including some very attractive wood framed varieties that add curb appeal and class to any home.
Up-and-over models (the projecting ones) have some disadvantages, such as not being able to operate if objects are placed too close to the door since they require a significant amount of free space in front of the garage when they are retracted.

A sectional door is made of four or more horizontal sections, hinged together, and mounted with rollers on tracks so that the door can roll straight up and back. The sectional design allows for the door to take up much less space, since it retracts straight up on the track.
They are more expensive, but they don't use up additional garage space and are usually stronger and safer.