There are several common types of doors used in homes and buildings. The most popular include hinged doors, which swing open and closed on hinges, and sliding doors, which move horizontally along a track. Bi-fold doors consist of multiple panels that fold together, while French doors are a pair of hinged doors that open outward, often featuring glass panes. Another type is the barn door, which slides on a track and adds a rustic charm. Pocket doors slide into the wall, saving space, while security doors are designed to provide enhanced protection. Each type serves different functional and aesthetic purposes.