AIB
- 2-Aminoisobutyric acid
- 3-Aminoisobutyric acid
- AAIB (disambiguation)
- ACLEDA Institute of Business
- AIB (NI)
- AIB College of Business
- AIB Group (UK)
- Academy of International Business
- Accident Investigation Board (disambiguation)
- Accident Investigation Bureau (disambiguation)
- Accountant in Bankruptcy
- Admiralty Interview Board
- Aeronautical Institute of Bangladesh
- Afghanistan International Bank
- Air Accidents Investigation Branch
- All India Bakchod
- Allied Intelligence Bureau
- Allied Irish Bank (GB)
- Allied Irish Banks
- Aluminium-ion battery
- American Institute of Baking
- American Institute of Bisexuality
- Anglo Irish Bank
- Anti-inflation Board
- Arts and Industries Building
- Association for International Broadcasting
- Association of Issuing Bodies
- Atlanta Interfaith Broadcasters
- Australian Institute of Building
- Australian Institute of Business
- Authenticated Identity Body
- Brazilian Integralist Action
- Nuclear receptor coactivator 3
- The Art Institute of Boston
- The Arts Institute at Bournemouth
- Äynu language