A Couple of Chicks A G Hospitality Management
  Abacus Abelow Public Relations
  Abercrombie & Kent ABetterStay.com
  AC Hotels By Marriott Accelerated Marketing Group
  Accenture Access Hotels & Resorts
  Access Hotels And Resorts Access Marketing
  AccorHotels Acentic
  ACTE ActivePrint x5
  ADACO Adoba Eco Hotel & Suites
  Adria Hotel Forum Adriatic Luxury Hotels
  Advantage Fitness Products Advantage Reserve
  Advaya Hospitality AdvertisingAge
  AEI Communications Affinia Hospitality
  AFL-CIO Working for America Institute AFM Hospitality
  AHLA AHRE Association of Hospitality Recruiting Executives
  Aimbridge Hospitality Air France
  airband Airbnb
  AirDepartment.com Airline Hotels and Resorts
  Airline News Resource AirRevive
  Akamai Aladdin
  ALICE All Star Vacation Homes
  All-Hotels.com Aloft Hotels
  Alpha Hospitality Alpha-Omega Financial
  AlSol ALT Hotels
  Amadeus Amanresorts
  Amble Resorts American Academy of Hospitality Sciences
  American Airlines American Colony Hotel
  American Culinary Federation American Express
  American Hotel & Lodging Educational Institute American Hotel Development Partners
  American Hotel Income Properties American Leisure
  American Property Tax Counsel American Realty Capital Hospitality Trust
  American Resort Development Association Americas Best Value Inn
  AmericInn AmeriHost
  Ameristar AMResorts
  Amsterdam Hospitality AMTELCO
  ANA Hotels Anantara Resorts
  Anchor Marketing Andaz
  APA Hotel Apertor Hospitality
  Apical Resource Group Appert Marketing Group
  Apple Core Hotels Apple Inc.
  Apple Nine Apple REIT
  Apple Tree Asia Appraisal Institute
  Aptech Aqua Hotels and Resorts
  Aqua-Aston Hospitality Aquatherm
  Aramark Archon Corporation
  Aria Hotels Ariane Systems
  Arlington Hospitality Arrowhead
  ARTEH Hotels and Resorts Arthur Andersen
  Aruba Ministry of Tourism and Transportation ASBTA
  Ascott Group ASE Hospitality
  ASFONA Asha Hotels
  Ashford Hospitality Prime Ashford Hospitality Trust
  ASIST Aspire Marketing
  Assa Abloy Asset Pros P2P
  Association of Travel Marketing Executives Association of Travel Marketing Executives (ATME)
  ASTA at-visions
  Atlantic City Hotel Experts Atlantica Hotels
  Atlantis Atlantis Hospitality Group
  Atlas Safety & Health Atlific
  Atura Hotels Auberge Resorts
  Autograph Collection Availpro
  Avalon Report Avasara
  Avendra AxisRooms
  Axxess Industries Inc Aztar