| Abbreviation | Definition |
|---|---|
| SMFS | Smoky Mountain Field School |
| SNE | Scouts New England |
| SOOS | Stacked Oscar On Scout |
| SOOS | Stacked Oscars On Scout |
| SOP | Sewanee Outing Program |
| SOS | Support Our Scouts |
| SOSSI | Scouts On Stamps Society International |
| SPARK | Scouts Practicing Amateur Radio Knowledge |
| SPL | Senior Patrol Leader |
| SS | Sea Scouts (BSA) |
| SSAGO | Student Scout And Guide Organisation |
| SSS | Scouting Seamanship and Service |
| SSV | Supplemental Scout Vehicle |
| SU | Scout Unit |
| SUTC | Scout Unit Training Camp |
| TACCS | Transatlantic Catholic Committee on Scouting |
| TDOTA | Thinking Day on the Air |
| TLC | Troop Leader Core |
| TLC | Troop Leaders Council |
| TOCO | Twin Oaks Camp Out |