Established in 1939, the American Osteopathic Association Bureau of Osteopathic Specialists (AOABOS) is a non-profit umbrella organization for 18 medical specialty boards in the United States. Along with the American Board of Medical Specialties (ABMS) and the American Board of Physician Specialties (ABPS), the AOABOS is one of three leading entities that oversees physician board certification in the United States. The AOABOS assists its Member Boards in developing and implementing educational and professional standards to evaluate and certify physician specialists.