- American Agricultural Economics Association
- American Airlines
- American Animal Hospital Association
- American Apparel and Footwear Association
- American Association for International Aging
- American Association for the Study of Liver Disease
- American Association of Blood Banks
- American Association of Critical-Care Nurses
- American Association of Motor Vehicle Administrators
- American Association of Nurse Assessment Coordinators
- American Association of Pastoral Counselors
- American Association of Tissue Banks
- American Automobile Association
- American Bankers Association
- American Bar Association
- American Benefits Council
- American Board for Certification in Orthotics and Prosthetics
- American Booksellers Association
- American Bridge Company
- American Business Machines
- American Cancer Society
- American Chemical Society
- American Chemistry Council
- American Chiropractic Association
- American CityVista, LLC
- American Club Championship
- American College of Cardiology
- American College of Chest Physicians
- American College of Clinical Pharmacy
- American College of Emergency Physicians
- American College of Healthcare Executives
- American College of Nurse-Midwives
- American College of Osteopathic Family Physicians
- American College of Osteopathic Surgeons
- American College of Physicians
- American College of Preventive Medicine
- American College of Radiology
- American Composites Manufacturers Association
- American Computer Software, LLC
- American Congress of Rehabilitation Medicine
- American Converters
- American Council of Engineering Companies of Colorado
- American Council of Life Insurers
- American Council of the Blind
- American Council on Education
- American Data
- American Data and Computer Products, Inc.
- American Dental Association
- American Diabetes Association
- American Diabetes Association - Central South Texas Office