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
  Adonara 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
  Airlines Reporting Corporation (ARC) AirRevive
  Akamai Aladdin
  ALICE Alila Hotels and Resorts
  All Star Vacation Homes All-Hotels.com
  Aloft Hotels Alpha Hospitality
  Alpha-Omega Financial AlSol
  ALT Hotels Alua 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 Hotels
  Anchor Marketing Andaz
  APA Hotel Apertor Hospitality
  Apical Resource Group Appert Marketing Group
  Apple Core Hotels Apple Hospitality REIT
  Apple Inc. Apple Nine
  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 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 Atlas Safety & Health
  Atlific Atura Hotels
  Auberge Resorts Autograph Collection
  Availpro Avalon Report
  AVANI Hotels Avasara
  Avendra avid hotels
  Avvio AxisRooms
  Axxess Industries Inc AYANA Hotels