| IAO | immediately after onset; intermittent aortic occlusion; International Association of Orthodontists |
|---|---|
| IAOM | International Association of Oral Myology |
| IAPB | International Association for Prevention of Blindness |
| IAPM | International Academy of Preventive Medicine |
| IAPP | International Association for Preventive Pediatrics; islet amyloid polypeptide |