| Australian Associated Bonsai Clubs | Academic & Science |
| American Academy of Biblical Counselors | Academic & Science |
| Access Anytime Bancorp, Inc. | Business |
| Amsterdam American Business Club | Business |
| Aspen Airport Business Center | Business |
| Arthur Andersen Business Consulting | Business |
| Auxiliaries Activities Business Center | Business |
| Auxiliaries and Activities Business Center | Business |
| Accrediting Association of Bible Colleges | Community |
| Associated Air Balance Council | Community |
| Associated Artists of Butler County | Community |
| Alberta Associations for Bright Children | Community |
| Asian American Baptist Church | Community |
| Advanced Automotive Battery Conference | Community |
| American Association of Birth Centers | Community |
| American Association of Bariatric Counselors | Community |
| Archives Association of British Columbia | Community |
| American Association of Bariatric Counseling | Community |
| AABC Token | Cryptocurrency |
| Absolute Anime of Broward County | General |
| Alabama Aquatic Biodiversity Center | General |
| Austin Area Birthing Center | General |
| Achieving Actual Behaviour Change | General |
| Achieve Actual Behaviour Change | General |
| Axis Aligned Bounding Cube | General |
| American Associaon of Birth Centers | General |
| Annalee Agrito Bonz Cariazo | General |
| Army Acquisition Basic Course | Governmental |
| Action Against Business Crime | Governmental |
| Australian Army Band Corps | Governmental |
| Asian American Business Council | International |
| Animals Are Brookhavens Concern | Medical |
| Alaska Association of Basketball Coaches | Regional |
| American Australian Business Council | Regional |
| American Amateur Baseball Congress | Sports |
