| Abbreviation | Definition |
|---|---|
| AANS | American Association for Netherlandic Studies |
| AANS | Aquaculture Association of Nova Scotia |
| AANS | Australian Army Nursing Service |
| AANT | Aan 't |
| AANT | American Academy of Neural Therapy |
| AANT | American Associates of the National Theatre |
| AANT | Animal Advocates of North Texas |
| AANT | Automobile Association of the Northern Territory |
| AANV | Adverb Adjective Noun Verb |
| AANY | Abbot Association of New York |
| AANZE | Aan Zee |
| AAO | Administrative Appeals Office |
| AAO | Advanced Acoustic Optimisation |
| AAO | Advanced Acoustic Optimization |
| AAO | Advanced Acoustics Optimization |
| AAO | Adverse Assumption Obstacle |
| AAO | Affirmative Action Officer |
| AAO | Agenda at Once |
| AAO | All At Onceness |
| AAO | Am Angegebenen Ort?? |