| Abbreviation | Definition |
|---|---|
| ATCR | Air Travel Consumer Reports |
| ATD | Australia Travel Declaration |
| ATDC | Assam Tourism Development Corporation |
| ATEC | Australian Tourism Export Council |
| ATEC | The Alberta Tourism Education Council |
| ATEED | Auckland Tourism Events and Economic Development |
| ATEED | Auckland Tourism Events Economic Development |
| ATGU | Arab Tourist Guides Union |
| ATIA | Alaska Travel Industry Association |
| ATIA | Australian Tourism Industry Association |
| ATIC | Australian Tourism Industry Council |
| ATICS | Automated Travel Insurance Claims System |
| ATID | Anaheim Tourism Improvement District |
| ATII | Association of Travel Insurance Intermediaries |
| ATIS | Advanced Traveler Information Systems |
| ATIS | Air Travel Information Service |
| ATIS | Air Travel Information System |
| ATL | Accessible Travel And Leisure |
| ATLAS | Australian Travel Leisure Automated System |
| ATM | Arabian Travel Market |