| Abbreviation | Definition |
|---|---|
| AMPTP | Alliance of Motion Picture and Television Producers |
| AMPTP | Alliance Of Motion Picture Television Producers |
| AMPTP | Alliance Of Motion Picture Tv Producers |
| AMRM | Alliance Maladies Rares Maroc |
| ANAL | Alliance of Neutral Alien Lifeforms |
| ANAN | Anti National Alliance Network |
| ANCR | Alliance for National and Community Resilience |
| ANCR | Alliance for National Community Resilience |
| ANDREW | African Nations Decide Raw Egg Whites |
| ANDREW | American Nations Decide Raw Egg Whites |
| ANEA | Alliance Nationale des Experts en Automobile |
| ANFE | Alliance for Native Financial Empowerment |
| ANG | ALLIANCE Next Generation |
| ANHA | Alliance of National Heritage Areas |
| ANMC | Alliance Nationale des Mutualités Chrétiennes |
| ANWA | Advanced Nuclear Weapons Alliance |
| AOA | Appalachia Ohio Alliance |
| AOC | Alliance of Civilizations |
| AOG | Alliance of Gentlemen |
| AOH | Alliance of Heroes |