Aoi
- AND-OR-Invert
- Africa Open Institute for Music, Research and Innovation
- Africa Orientale Italiana
- All Ordinaries
- Ancona Airport
- Angle of incidence (disambiguation)
- Ao (color)
- Aoi (TV series)
- Aoi (name)
- Aoi (song)
- Aoi (trigraph)
- Aoi Matsuri
- Aoi Oshitayashiki
- Aoi-ku, Shizuoka
- Arab Organization for Industrialization
- Arctic oscillation
- Area of responsibility
- Art Official Intelligence
- Articles of incorporation
- Association of Illustrators
- Association of the Oldest Inhabitants of the District of Columbia
- Automated optical inspection
- De La Soul
- Mon (emblem)
- Stellenbosch University
- Tokugawa clan