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Doors and Windows: These are entryways and openings in walls or partitions that allow access to the inside or outside of a building. Doors are typically hinged or sliding panels that can be opened or closed to provide security and privacy. Windows are transparent or translucent openings in walls that allow light to enter a room and provide views of the outside. Both doors and windows come in a variety of materials, styles, and sizes to suit different architectural and functional needs.