| Abbreviation | Definition |
|---|---|
| ADTA | Abu Dhabi Tourism Authority |
| ADTD | Amadeus Dynamic Travel Documents |
| AEBT | American Express Business Travel |
| AEFO | association europeenne de formation a l'oenotourisme |
| AETI | American Express Travel Insurance |
| AGLTA | Australian Gay and Lesbian Tourism Association |
| AGTC | Asia Golf Tourism Convention |
| AH | American Hotel |
| AHATA | Aruba Hotel And Tourism Association |
| AHTR | Advances in Hospitality and Tourism Research |
| AIHM | Ambala Institute of Hotel Management |
| AIHM | Ambrosia Institute of Hotel Management |
| AITI | Adventure International Tours Inc |
| AITS | Aviation Indonesia Travel Services |
| AITSC | Asian Institute of Tourism Student Council |
| AJTF | Astindo Jakarta Travel Fair |
| ALTO | Assocation of Language Travel Organisations |
| ALTO | Association of Language Travel Organizations |
| ALVA | Association of Leading Visitor Attractions |
| AMTA | Accelerated Master Of Tourism Administration |