A "Do Not Disturb Sign" is a notice typically placed on doors to indicate that the occupants do not wish to be interrupted. Commonly found in hotels, homes, and offices, these signs help maintain privacy and minimize disturbances. They can be made from various materials, such as paper, plastic, or wood, and often feature simple text or symbols. These signs are especially useful in settings like hotels, where guests may want to relax or work without interruptions from staff. They can also be used in offices to signal that someone is busy and should not be disturbed during important tasks or meetings.