| Abbreviation | Definition |
|---|---|
| BTWA | Barona Tribal Water Authority |
| CAA | Certificate Authority Authorization |
| CAA | Certification Authority Authorization |
| CAA | Civil Action Authority |
| CAA | Civil Aviation Authority |
| CAAB | Civil Aviation Authority of Botswana |
| CAAF | Civil Aviation Authority of Fiji |
| CAAI | Civil Aviation Authority of Israel |
| CAAM | Civil Aviation Authority Macau |
| CAAM | Civil Aviation Authority of Malaysia |
| CAAN | Civil Aviation Authority of Nepal |
| CAAT | Civil Aviation Authority of Thailand |
| CAATI | Civil Aviation Authority Training Institute |
| CAAZ | Civil Aviation Authority of Zimbabwe |
| CAC | Commonwealth Authorities And Corporations |
| CAFA | Capital Area Finance Authority |
| CAK | Communications Authority of Kenya |
| CAPSA | Canadian Association of Pension Supervisory Authorities |
| CARA | Central Adoption Resource Authority |
| CASC | Certificate Authority Security Council |