AA: Alzheimer's Association
AAAA: American Academy of Anesthesiologist Assistants
AAAC: American Academy of Ambulatory Care
AAAD: American Athletic Association of the Deaf
AAAD: Asian Academy of Aesthetic Dentistry
AAAH: American Association of Alternative Healers
AAALAC: Association for Assessment and Accreditation of Laboratory Animal Care International
AAALF: American Association for Active Lifestyles and Fitness
AAAOM: American Academy of Acupuncture and Oriental Medicine
AABP: American Academy of Behavioral Psychology
AAcA: Australian Acupuncture Association
AACB: Australasian Association of Clinical Biochemists
AACB: Australian Association of Clinical Biochemists
AACC: American Association for Continuity of Care
AACMA: Australian Acupuncture and Chinese Medicine Association
AACOMAS: American Association of Colleges of Osteopathic Medicine Applications Service
AACP: American Academy of Cardiovascular Perfusion
AACVPR: American Association of Cardiovascular and Pulmonary Rehabilitation
AAD: American Academy of Denturity
AADEP: American Academy of Disability Evaluating Physicians
AADH: American Academy of Dental Hygiene
AADR: American Association for Dental Research
AADW: American Association of Dental Webmasters
AAED: American Academy of Esthetic Dentistry
AAHFP: American Academy of Health & Fitness Professionals
AAID: American Academy of Implant Dentistry
AAMAS: American Association of Medical Audit Specialists
AAN: Australian Association of Neurologists
AAOGU: Australian Association of Obstetrical and Gynaecological Ultrasonologists
AAPI: American Association of Physicians of Indian Origin
AAPM: American Academy of Pain Medicine
AAPMR: American Academy of Physical Medicine & Rehabilitation
ABA: Association for Behavior Analysis
ABCRS: American Board of Colon and Rectal Surgery
ABCSG: Austrian Breast & Colorectal Cancer Study Group
ABOP: American Board of Ophthalmology
ABPMR: American Board of Physical Medicine & Rehabilitation
ABTS: American Board of Thoracic Surgery
ACC: Australian Cancer Council
ACEM: Australian College for Emergency Medicine