Uniforms provide instant recognition of workers, employees, service personnel, students and others. Homeowners know the delivery man will wear a brown uniform, and employees in a large building know the maintenance staff wears blue uniforms with name tags, People are identified by their uniforms -- nurses, law enforcement, restaurant workers. Uniforms also let people know that the wearer's responsibilities are limited. A person can safely approach a law enforcement officer for help if he is wearing a uniform. In a hospital, a stranger who enters a patient's room does not cause alarm if she is wearing nursing scrubs.