- Association of Air Medical Service
- Association of American Publishers, Inc.
- Association of American Railroads
- Association of Clinical Research Professionals
- Association of College and University Housing Officers International
- Association of Equipment Management Professionals
- Association of Flight Attendants-CWA
- Association of Florida Healthcare Auxiliaries-Volunteers, Inc. AFHAV)
- Association of Fundraising Professionals
- Association of Hispanic Healthcare Executives
- Association of Independent Corrugated Converters
- Association of Jewish Aging Services
- Association of Minnesota Counties-Belview
- Association of Minnesota Counties-Duluth
- Association of Nutrition and Foodservice Professionals
- Association of Ohio Philanthropic Homes for the Aged
- Association of Oregon Counties
- Association of Organ Procurement Organizations
- Association of Professional Director's of YMCA's in the U.S.
- Association of Public Health Laboratories
- Association of Public Health Laboratories
- Association of Public Safety Communications Officials International
- Association of Schools and Agencies for the Handicapped
- Association of Schools and Colleges of Optometry
- Association of University Research Parks
- Association of Women's Health, Obstetric and Neonatal Nurses
- Association of Zoos and Aquariums
- Association Research Inc.
- Association Resource Center
- Association Services Group
- Association Services of Michigan
- Association Trends
- Association Vision
- AssociationGate
- Associations Plus
- Assumption Community Hospital
- Assurant
- ASTD
- Astellas Pharma US, Inc.
- Aston Park Health Care Center, Inc.
- AstraZeneca Pharmaceuticals
- Astrolabe Analytics, Inc.
- ATandT
- ATandT
- ATandT Store Lees Summit
- ATandT Virginia
- Athens Academy
- Athens Area Chamber-Commerce
- Athens Area Emergency Food Bank
- Athens Banner-Herald