Airlines Reporting Corporation ARC handles airline ticket distribution, control and settlement and controls accreditation of travel agencies that issue airline tickets. http://www.arccorp.com/

Association of Travel Marketing Executives ATME - a professional, non-profit association of executives with vital responsibilities in the marketing of tourism and travel worldwide. http://www.atme.org/

American Sightseeing International ASI - worldwide association of sightseeing, tour and charter companies with members in most tourism areas. Allied with WATA. http://www.americansightseeing.org/

Interactive Travel Services Association ITSA - an online travel industry trade group devoted to eliminating barriers to growth and protecting consumers. http://www.interactivetravel.org/

Cruise Lines International Association CLIA - the official trade organization of the cruise industry of North America. It offers support and training for the travel agent community, including the Cruise Counsellor Certification Program. (Requires flash player.) http://www.cruising.org/

International Air Transport Association IATA - a trade association representing and serving the airline industry world-wide. http://www.iata.org/

The Travel Industry Association of America TIA - a non-profit, national association that represents and speaks for the common interests and concerns of all components of the U.S. travel industry. http://www.tia.org/

Air Transport Association ATA - the national trade organization of the principal U.S. airlines, promoting and supporting the air transport industry. http://www.air-transport.org/

Airports Council International North America ACI-NA represents local, regional and state governing bodies that own and operate commercial airports in the United States and Canada. http://www.aci-na.org/

American Bus Association ABA - a trade association representing motorcoach and tour companies, travel and tourism organizations, and suppliers of bus products and services in the U.S. and Canada. http://www.buses.org/

Society of Incentive and Travel Executives SITE - a worldwide organization of business professionals dedicated to the recognition and development of motivational and performance improvement strategies of which travel is a key component. http://www.site-intl.org/

National Business Travel Association The NBTA represents the interests of corporate travel managers and travel service providers in the U.S. http://www.nbta.org/

Regional Airline Association The RAA represents U.S. regional airlines and the suppliers of products and services that support the industry, before federal and state agencies. http://www.raa.org/

Passenger Vessel Association PVA - a national association representing the interests of owners and operators of dinner cruise vessels, sightseeing and excursion vessels, gaming boats, car and passenger ferries, private charter vessels, and overnight cruise ships under U.S., state, or Canadian regulations. http://www.passengervessel.com/

Society for the Advancement of Travelers with Handicaps SATH - a non-profit educational organization that represents travelers with disabilities and promotes the creation of a barrier-free environment throughout all segments of the travel and tourism industry. http://www.sath.org/

Society Of Government Travel Professionals SGTP - a national, non-profit association for Government travel / finance managers, suppliers and travel agents in the U.S. travel market. http://www.government-travel.org/

United States Tour Operators Association USTOA - a professional association representing the tour operator industry, composed of tour companies who conduct business in the U.S. http://www.ustoa.com/

Airports Council International The international association of the world's airports. ACI fosters cooperation among its member airports and with other partners in world aviation, including governmental, airline and aircraft manufacturing organizations. http://www.airports.org/

European Regions Airline Association ERAA - the representative body for regional air transport throughout Europe. It currently represents 78 airlines and 49 airports. http://www.eraa.org/

International Association of Convention and Visitor Bureaus IACVB - promotes professional practices in the solicitation and servicing of meetings and conventions. http://www.iacvb.org/