| AAB | Australasian Associated Brewers |
|---|---|
| AAP | Australian Associated Press (skr.) |
| ABE | Automated Buyer Environment |
| ABS | Automated Billing System |
| AC | Anticipated Convection, kód pre predpovede silnej búrky |
| ADC | Automated Data Collection |
| ADN | Abbreviated Dialing Number |
| ADT | Articulated Dump Truck |
| API | Associated Press of India (skr.) |
| ARI | Alcohol Related Illness |