sort by Rank | Alpha
| Possible Meanings | Rank |
| American Ornithologists Union | **** |
| Adults of Unity | *** |
| Asian Outreach Unit | *** |
| Academic Organisational Units | *** |
| Active Osteogenic Unit | ** |
| Application to Own Use | ** |
| Amusement Operators Union | ** |
| Academic Organisation Unit | ** |
| Areas of Uncertainty | ** |
| Atheists of Utah | ** |
| Academic Organization Unit | * |
| Administration and Operations Unit | * |
| Aikido Organization at UCR | * |
| Anal Orifi Unwelcome | * |
| Arrhythmic Output Unit | * |