| Abbreviation | Definition |
|---|---|
| SO | Small Outline |
| SO | Special Operations |
| SO | Special Orders |
| SO | Superseded Or Obsolete |
| SO/LIC | Special Operations/Low Intensity Conflict |
| SOA | Separate Operating Agency |
| SOA | Soldiers Of Agony |
| SOA | Special Operations Aircraft |
| SOA | Special Operations Aviation |
| SOA | Speed of Advance |
| SOA | Start Of Authority |
| SOA | Status of Action |
| SOA | Sustained Operations Ashore |
| SOACMS | Special Operations Aviation Combat Mission Simulator |
| SOAF | Status of Action File |
| SOAGS | Special Operations Air-Ground System |
| SOAR | Special Operations Air Regiment |
| SOAS | Special Operations ADP (Automatic Data Processing) System |
| SOAS | Special Operations ADP System |
| SOAT | Special Operatives Anti Terrorism |