| A/C | klimatizácia, po anglicky |
|---|---|
| A4O | označenie lietadiel Ománu, Omán (označenie lietadiel) |
| AAA | Amatérska atletická asociácia (skr.) |
| AAA | amateur athletic association (skr.) |
| AAB | Advertising Association of Baltimore |
| AAB | American Association for Bronchology |
| AAB | American Association of Bioanalytics |
| AAB | Anglo American Book |
| AAB | Army Air Base |
| AAC | Academic Advisory Center |