Aia (disambiguation)
- AIA Group
- Abstract intelligent agent
- Access to Information Act
- Adelaide Airport
- Aea (Malis)
- Aerospace Industries Association
- Afghan Interim Administration
- Afraid (film)
- Aia
- Aia (plant)
- Aia tseui
- Air Force Intelligence, Surveillance and Reconnaissance Agency
- Aliens in America
- Alliance Municipal Airport
- Alliance of Independent Authors
- America's Infrastructure Alliance
- American Institute of Architects
- American Insurance Association
- American International Airways
- Amerindo Investment Advisors
- Anglo-Irish Agreement
- Anguilla
- Anti-Imperialist Action Ireland
- Anti-Injunction Act
- Application Integration Architecture
- Archaeological Institute of America
- Arizona Interscholastic Association
- Art Institute of Atlanta
- Artists' International Association
- Asociación Iberoamericana de Atletismo
- Associate of the Institute of Actuaries
- Association for Industrial Archaeology
- Association of International Accountants
- Athens International Airport
- Athletes in Action
- Atmospheric Imaging Assembly
- Auckland Airport
- Auckland International Airport Limited
- Australian Institute of Architects
- Automated Imaging Association
- Automated immunoassay
- Autódromo Internacional do Algarve
- Avies
- Capital allowance
- E. C. Vivian
- Florida State Road A1A
- Gipuzkoa
- Kutaisi
- Leahy-Smith America Invents Act
- Oiartzun
- Peñas de Aya
- Public key infrastructure
- SGAS
- Saint Aia