IOAA
| Acronym | Definition |
|---|---|
| IOAA | International Olympiad on Astronomy and Astrophysics (est. 2007) |
| IOAA | Intentions of an Arsonist (band) |
| IOAA | Intentions of an Asteroid (band) |
| IOAA | Institute of Actuaries of Australia |
| IOAA | Immediate Office of the Assistant Administrator |
| IOAA | Image of an Assassination (documentary) |