The letters stand for the degree the therapist has earned and whether he or she is registered and licensed. All therapists have to pass an examination in order to become registered. For example, MS, OTR/L means "master of science in occupational therapy, a registered and licensed therapist." Some therapists have FAOTA after their credentials. This means that they have been asked to be a Fellow of the American Occupational Therapy Association. This distinction is awarded to therapists in recognition of their skill and knowledge, which has resulted in the growth and improvement of occupational therapy.