| Abbreviation | Definition |
|---|---|
| AABBA | Anchorage, Alaska Bed and Breakfast Association |
| AANT | Automobile Association Northern Territory |
| AATA | American Airlines Travel Academy |
| AATC | African American Travel Conference |
| AATP | Azerbaijan Austrian Tourism Programme |
| AATR | Approved Academic Travel Rider |
| AATT | Adventure Australia Treks Tours |
| ABBT | African Bush Bird Tours |
| ABET | Al Badeyah Eyes Tourism |
| ABTA | African Business Travel Association |
| ABTA | Associtaion of British Travel Agents |
| ABTA | Austrian Business Travel Association |
| ACERT | Arizona Council for Enhancing Recreation and Tourism |
| ACTA | Association of Canadian Travel Agencies |
| ACTO | Angeles City Tourism Office |
| ACTP | Atlantic Canada Tourism Partnership |
| ACTV | Association of Corporate Travel Veneziano |
| ADCT | Association for Development of Cultural Tourism |
| ADM | Arrival and Departure Monitor |
| ADPT | Arkansas Department of Parks and Tourism |