| Abbreviation | Definition |
|---|---|
| ATM | Awesome Traveling Machine |
| ATMA | Android Travel Mate Application |
| ATMC | Advances in Tourism Marketing Conference |
| ATMT | Awareness Through Mosque Tours |
| ATOA | Australian Tour Operators Association |
| ATOL | Air Travel Organisers Licence |
| ATOL | Air Travel Organisers Licensing |
| ATOL | Air Travel Organisers' Licensing |
| ATPI | Advanced Travel Partners International |
| ATPI | Air Travel Price Index |
| ATPS | Airline Travel Payments Summit |
| ATR | Africa Travel Resource |
| ATRP | Avios Travel Rewards Programme |
| ATSAP | Akwesasne Tourism Strategic Action Plan |
| ATSC | Air Travellers Security Charge |
| ATSC | Arlington Travel Soccer Club |
| ATSP | Asymmetric Traveling Salesman Problem |
| ATTA | Adventure Travel Trade Association |
| ATTA | African Travel and Tourism Association |
| ATTA | Association of Thai Travel Agents |