A registered nurse (RN) is a nurse who has graduated from a nursing program at a university or college and has passed a national licensing exam.[1] A registered nurse helps individuals, families, and groups to achieve health and prevent disease. They care for the sick and injured in hospitals and other health care facilities, physicians' offices, private homes, public health agencies, schools, camps, and industry. Some registered nurses are employed in private practice.[2] A registered nurse's scope of practice is determined by each state's Nurse Practice Act. It outlines what is legal practice for registered nurses and what tasks they may or may not perform.