| AAO | American Academy of Osteopathy; American Academy of Ophthalmology; American Academy of Optometry; American Academy of Otolaryngology; American Association of Ophthalmologists; American Association of Orthodontists; amino acid oxidase; ascending aorta; awake, alert, and oriented |
|---|---|
| AAo | ascending aorta |
| AAOC | antacid of choice |
| AAofA | Ambulance Association of America |
| AAOHN | American Association of Occupational Health Nurses |
| AAOM | American Academy of Oral Medicine |
| AAOO | American Academy of Ophthalmology and Otolaryngology |
| AAOP | American Academy of Oral Pathology |
| AAOPP | American Association of Osteopathic Postgraduate Physicians |
| AAOS | American Academy of Orthopedic Surgeons |