An automatic door that opens automatically, usually on sensing the approach of a person.
A swing-door operator (or swing-door opener) is a device that operates a swing door for pedestrian use. It opens or helps open the door automatically, waits, then closes it.
A revolving door typically consists of three or four doors that hang on a central shaft and rotate around a vertical axis within a cylindrical enclosure.
There are several types of sliding doors such as pocket doors, Arcadia doors, and bypass doors. Sliding doors are commonly used as shower doors, glass doors, screen doors, wardrobe doors or in vans.