Automatic doors are entrance systems that open and close without the need for manual operation. They use sensors to detect when a person is approaching, allowing the doors to slide or swing open automatically. This feature is especially useful in busy places like shopping malls, hospitals, and airports, where hands-free access is important for convenience and safety. These doors can be powered by electricity or batteries and often include safety mechanisms to prevent accidents. Common types of automatic doors include sliding doors, swing doors, and revolving doors. They enhance accessibility for individuals with disabilities and improve the flow of foot traffic in public spaces.