- AAOS stands for American Academy of Orthopaedic Surgeons
- AAOS stands for Analysis of Aspect Oriented Software
- AAOS stands for Ann Arbor Orchid Society (Michigan)
- AAOS stands for Army Aviation Operations Section
- AAOS stands for Associated Arts of Ocean Shores (est. 1974; Ocean Shores, WA)
- AAOS stands for Acoustic Artillery Observer Subsystem
AAOS