| Italian Library Association | Academic & Science |
| Australian Institute of Biology | Academic & Science |
| AIB College of Business | Academic & Science |
| Academy of International Business | Academic & Science |
| Academy of International | Academic & Science |
| Anita Bay (ak) | Airport Code |
| Allied Irish Bank | Banking |
| Accountant In Bankruptcy | Banking |
| Allied Irish Banks | Banking |
| Afghanistan International Bank | Banking |
| Allied Irish Banks, P. L. C. | Business |
| Adult Industry Business | Business |
| Advisors Insurance Brokers | Business |
| Airsports Insurance Bureau | Business |
| American Institute of Baking | Business |
| American Institute of Banking | Business |
| Association for International Business | Business |
| Aurora Infrastructure Buy Write Income Trust | Business |
| Abiding In Bobbio | Community |
| Association for International Broadcasting | Community |
| Arts and Industries Building | Community |
| Association of Issuing Bodies | Community |
| Authenticated Identity Body | Computing |
| Adjacency Information Base | Computing |
| As Instructed By .... | Computing |
| Add In Board | General |
| All India B | General |
| All India Breadroast | General |
| All India Butthurt | General |
| Advanced Interface Bus | General |
| Asbestos Insulation Board | General |
| Am I Boverd | General |
| Activity In Box | General |
| America In Bloom | General |
| Advanced Integrated Blockchains | General |
| Alabama Industries for the Blind | General |
| Animated Inanimate Battle | General |
| Actuarial Information Browser | General |
| Aurora Infrastructure Buy | General |
| Autoliv India Bangalore | General |
| All India Bakchod | General |
| Atlanta Interfaith Broadcasters | General |
| Associazione Italiana Biblioteche | General |
| Asbestos Insulating Board | General |
| American Institute of Bakery | Governmental |
| Accident Investigation Bureau | Governmental |
| American Institute of Bakers | Governmental |
| Alien Investigation Bureau | Governmental |
| Accident Investigation Board | Governmental |
| American Institutes of Baking | Governmental |
| American Institute of Bisexuality | Governmental |
| Accountable Institutions and Behavior | Governmental |
| American Institute of Balance | Governmental |
| Anti Infringement Bureau | Governmental |
| Aeronautical Institute of Bangladesh | Governmental |
| Automobile Insurers Bureau | Governmental |
| Arab International Bank | International |
| Association of International Broadcasting | International |
| Asian Insane Boys | International |
| Advanced Internet Blocks | Internet |
| Air Inside Bone | Medical |
| After I Buy | Messaging |
| Australian Institute of Builders | Regional |
| Australian Institute of Business | Regional |
| Australian Institute of Building | Regional |
| Aberdeen Ironbirds | Sports |
