ASI
- AS-Interface
- Acoustic impedance
- Acta Slavica Iaponica
- Adam Smith Institute
- Advertising Specialty Institute
- Airspeed indicator
- American Strategic Insurance
- Anjuman Serfaroshan-e-Islam
- Anthropological Survey of India
- Anti-suit injunction
- Applied Spectral Imaging
- Archaeological Services Inc.
- Archaeological Survey of India
- Arrêt sur images
- Artificial superintelligence
- Asi (Mahabharata)
- Asi (TV series)
- Asi Taulava
- Asi language
- Asia
- Asia (disambiguation)
- Asian Social Institute
- Assistant Sub-Inspector of Police
- Asynchronous serial interface
- Así
- Autonomous Solutions, Inc.
- Defensive semicolon
- Italian Space Agency
- Moon Society
- Orontes River
- Ossetians
- PCI Express
- RAF Ascension Island