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Windows and Doors refer to the openings in the walls of a building that are specifically designed to allow light and air to enter a space, as well as provide access to the exterior. Windows are typically made of glass panels within a frame, allowing for visibility and natural light, while doors are solid structures that can be opened and closed to allow passage in and out of a room or building. Both windows and doors come in a variety of styles, sizes, and materials to suit different architectural designs and functional needs.