| Abbreviation | Definition |
|---|---|
| SAO | Smooth Approach Orifice |
| SAO | Southern Association of Orthodontists |
| SAO | Special Agreements Officer |
| SAO | Special Astrophysical Observatory |
| SAO | Stabilised Aqueous Ozone |
| SAO | Stabilized Aqueous Ozone |
| SAO | Stand As One |
| SAO | Standard Application Online |
| SAO | Standards Are Overrated |
| SAO | Store Assortment Online |
| SAO | Subject access office |
| SAO | sword art onlie |
| SAO | Sword Art Online |
| SAOA | Saginaw Athletic Officials Association |
| SAOA | South African Optometric Association |
| SAOA | South Australian Ornithological Association |
| SAOA | Southeastern Athletic Officials Association |
| SAOA | Stichting Aanpak Overlast Amsterdam |
| SAOA | Sword Art Online Award |
| SAOC | Schiphol Airline Operators Committee |