| ABA | Australian Broadcasting Authority |
|---|---|
| AEA | Atomic Energy Authority (skr.) |
| APOLLO | postava v komikse The Authority od Wildstorm Comics |
| BSA | Broadcasting Standards Authority |
| BSA | Building Services Authority |
| CASA | Civil Aviation Safety Authority |
| CPA | Coalition Provisional Authority |
| EPA | Environment Protection Authority |
| ETA | Electronic Travel Authority, austrálske elektronické víza |
| NRA | National Roads Authority |