| Appalachian Entrepreneurship Academy | Academic & Science |
| Academic Experiences Abroad | Academic & Science |
| Advantage Engineering Associates | Academic & Science |
| Association of Engineers and Architects | Academic & Science |
| Atomic Energy Agency | Academic & Science |
| Akhbar El-Youm Academy | Academic & Science |
| Spanish Association of Arboriculture | Academic & Science |
| Asociación Española de Arboricultura | Academic & Science |
| Brazilian Association of Automotive Engineering | Academic & Science |
| Associação Brasileira de Engenharia Automotiva | Academic & Science |
| Association of Enterprise Architects | Academic & Science |
| Abemama Atoll | Airport Code |
| American Engineering Association | Business |
| American Electrology Association | Community |
| Actors Equity Association | Community |
| Alabama Education Association | Community |
| Area Education Agency | Community |
| Adoption Exchange Association | Community |
| American Evaluation Association | Community |
| American Escrow Association | Community |
| American Economic Association | Community |
| Arkansas Education Association | Community |
| Association for Exchange and Agriculture | Community |
| Arizona Education Association | Community |
| Area Education Agencies | Community |
| Average Educational Achievement | Community |
| Aquatic Exercise Association | Community |
| Automotive Electric Association | Community |
| Almost Extinguished Association | Community |
| Activity End Acknowledge | Computing |
| Aussie Elite Assassins | Computing |
| Advanced Encryption Algorithm | Computing |
| American e-Commerce Association | Computing |
| American Electronics Association | Electronics |
| Alternative Examination Arrangements | General |
| Agricultural Enterprise Areas | General |
| Ariel Ethan Alexis | General |
| Albert Einstein Academies | General |
| Acoustic Emission Analysis | General |
| Advancing Eco Agriculture | General |
| Automotive Excellence Awards | General |
| Automovilistas Europeos Asociados | General |
| Associacao Brasileira de Engenharia Automotiva | General |
| Asociacion Ecuatoriana Automotriz | General |
| Automotive Executives Association | General |
| American Emu Association | General |
| Aircraft Electronics Association | General |
| Advanced Extension Awards | General |
| Auto Electrics Australia | General |
| Automotive Enthusiast Apparel | General |
| Amazon Echo Auto | General |
| Automotive Electronic Association | General |
| Air Entraining Admixture | General |
| Advanced Extension Award | General |
| Asociación Española de Artroscopia | General |
| Albers Equal Area | General |
| Above Elbow Amputation | General |
| Appreciate educate accelerate | General |
| Agricultural Extension Agent | General |
| Adiabatic Electron Affinity | General |
| Association Education Alliance | Governmental |
| Approved Enforcement Agency | Governmental |
| Actual Expense Allowance | Governmental |
| American Employees Association | Governmental |
| Area Environmental Agency | Governmental |
| Association for Energy Affordability | Governmental |
| American Energy Alliance | Governmental |
| Am Energy Alliance | Governmental |
| Atomic Energy Act | Governmental |
| Agencia Espacial Europea | International |
| Atom Enerjisi Ajansi | International |
| Auto Erotic Asphyxiation | Medical |
| Automation Economic Analysis | Military and Defence |
| Alaska Energy Authority | Regional |
| Association of European Airlines | Regional |
| Antenna Electronics Assembly | Space Science |
