| AAB | American Association for Bronchology |
|---|---|
| AAB | Annals of Applied Biology |
| AAD | American Academy of Dermatology |
| AAN | American Academy of Neurology (skr.) |
| AAS | American Association of Suicidology |
| ABP | American Board of Pathology |
| ABT | Advanced Backplane Technology |
| ACR | American College of Radiology |
| ACT | Advanced Computer Technology |
| ACT | Alternative Control Technology |