| A/C | klimatizácia, po anglicky |
|---|---|
| A4O | označenie lietadiel Ománu, Omán (označenie lietadiel) |
| AAA | Anglická únia atlétov (angl.skr.) |
| AAB | Adaptive Angle Bias |
| AAB | Alliance Agricole Belge |
| AAB | American Association for Bronchology |
| AAB | American Association of Bioanalytics |
| AAB | Anderson Anderson and Brown |
| AAB | Anglo American Book |
| AAB | Annals of Applied Biology |