| Asociación Argentina de Oncología Clínica | Academic & Science |
| Analysis and Application Oriented Courses | Academic & Science |
| Academic Advising And Outreach Center | Academic & Science |
| Arkansas Academy of Computing | Academic & Science |
| Amphibious Airspace Operations Coordination | Academic & Science |
| Argentine Association of Clinical Oncology | Academic & Science |
| Asociación Argentina de Oncología Clínica | Academic & Science |
| Americas Account Opening Center | Accounts and Finance |
| Advanced Automation Of California | Business |
| Arts Association of Oldham County | Business |
| Ayr Amateur Opera Company | Business |
| African American Opportunity Centers | Community |
| Apartment Association of Orange County | Community |
| African American Outreach Committee | Community |
| Alzheimer's Association Of Orange County | Community |
| Arts Alliance of Ogle County | Community |
| Albanian Autocephalous Orthodox Church | Community |
| Around And About Orange County | Community |
| Annual Affiliate Officers Conference | Community |
| Austin Atlantic Owners Club | General |
| Ariel Atom Owners Club | General |
| Agya Ayla Owners Community | General |
| Amigos Agenda OCLC Connection | General |
| An Array of Charm | General |
| Activate Analyze Offer and Close | General |
| Albanian American Organization Chameria | General |
| Australian Army Ordnance Corps | Governmental |
| Assemblée des Associations et Organismes Culturels | International |
| Ambulance Association of Orange County | Medical |
| Altoona Arthritis and Osteoporosis Center | Medical |
| Ambulatory Anesthesia of Chicago | Medical |
| Anti Aircraft Operations Center | Military and Defence |
| Arm Arterial Occlusion Cuffs | Military and Defence |
| African American Opioid Coalition | Regional |
| Athletic Academic Oversight Committee | Sports |
| Athletic and Academic Oversight Committee | Sports |
