Folding doors are often used to conceal a wide space where a conventional door’s swing would be awkward or restricted. Mounted in hinged-together pairs, folding doors combine the actions of both sliders and hinged doors, using both end pivots and overhead tracks.

Bypass doors, often used on closets or storage areas, are lightweight indoor sliders that hang from rollers that run along an overhead track. They're typically mounted in pairs or threes; they bypass one another to allow access.

A pocket door is another type of slider that is ideal for places where there isn’t room for a door to swing. It slides into a space, or “pocket,” that is installed in the wall.

Conventional hinged doors may be either right or left handed. A door that opens toward you and has the door knob on the right is right handed. A door hinged on the opposite side is left handed.