| 3C | Rovníková Guinea (označenie lietadiel) |
|---|---|
| AACO | Armenian American Christian Outreach |
| AACO | Asian Americans for Community Outreach |
| AALTO | fínsky realistický architekt (Alvar, 1898-1976) |
| AAO | Area Audit Office |
| AAP | Area Action Plan |
| AAR | Alliance for Aging Research |
| AARO | Ann Arbor Reaching Out |
| AAS | Adopt-A-Stream |
| AAS | Alert Area Supervisor |