Adi
- ADI 4277 and ADPF 132
- ADI Corporation
- ADY (disambiguation)
- Aadi (disambiguation)
- Acceptable daily intake
- Addi (disambiguation)
- Adhi (disambiguation)
- Adi (Chikodi)
- Adi (Khanapur)
- Adi (film)
- Adi (mythology)
- Adi (name)
- Adi (title)
- Adi Island
- Adi Parva
- Adi Shankara
- Adi language (Galo)
- Adi people
- Adi people
- Adi tala
- Adi, Israel
- Adis (disambiguation)
- Aerodynamics Inc.
- Africa Development Indicators
- Ahmedabad Junction railway station
- Aircraft Designs
- Alternating direction implicit method
- Analog Devices
- Animal Defenders International
- Approved Driving Instructor
- Arandis Airport
- Association for Information Science and Technology
- Associazione per il Disegno Industriale
- Attitude direction indicator
- Australian Doctors International
- Authorised deposit-taking institution
- Autism Diagnostic Interview
- Banu Adi
- Deakin University
- Independent Democratic Action
- Jain
- Mancala
- Rishabhanatha
- Thales Australia
- Tirthankara
- Water injection (engine)
- Ángeles del Infierno