| iacvb.org | International Association of Convention and Visitor Bureaus |
| atme.org | Association of Travel Marketing Executives |
| atlas-euro.org | Association for Tourism and Leisure Education |
| arccorp.com | Airlines Reporting Corporation |
| americansightseeing.org | American Sightseeing International |
| air-transport.org | Air Transport Association |
| adventuretravel.biz | Adventure Travel Trade Association |
| acte.org | Association of Corporate Travel Executives |
| acriss.org | The Association of Car Rental Industry Systems Standards |
| aaco.org | Arab Air Carriers Organization |
United States , Illinois , Chicago