| Acronym | Definition |
|---|
| AOSA | American Orff-Schulwerk Association |
| AOSA | Association of Official Seed Analysts |
| AOSA | American Optometric Student Association |
| AOSA | Association of Official Seed Analysis |
| AOSA | Alden Ocean Shell Association |
| AOSA | Ackworth Old Scholars Association (UK) |
| AOSA | Acousto-Optic Spectrum Analyzer |
| AOSA | Airport Open Space Advocates (Colorado) |
| AOSA | Alberta Offshore Sailing Association (Edmonton, Alberta, Canada) |
| AOSA | American Overseas Schools Archive |
| AOSA | Aspect-Oriented Software Association, Inc. |
| AOSA | Arkansas/Oklahoma Sustainable Agriculture (network) |
| AOSA | Airborne Optical Sensor Adjunct |
| AOSA | American Oxford Sheep Association |
| AOSA | AlphaOmega System Associates |
| AOSA | Army Overseas Service Association |
| AOSA | Afloat Operational Safety Assessments (US Navy) |
| AOSA | Associated Off-Site Areas |