| Abbreviation | Definition |
|---|---|
| SNT | Saturday Night Thunder |
| SNW | ScubaNorthWest |
| SNZ | Springs Speedway Auckland New Zealand |
| SO | Strike Out |
| SOA | Sports Outreach America |
| SOAR | Sports And Outdoor Assistive Recreation |
| SOAR | Sports Outreach And Recreation |
| SOAR | Stay Out Of Areas Of Racing |
| SOAR | Summer Orientation About Rivers |
| SOAR | Summer Outdoor Activities And Recreation |
| SOC | Standard Obstacle Course |
| SOCCER | Sports Organization for Collective Contributions and Equal Rights |
| SOCOG | Sydney Organising Committee for the Olympic Games |
| SOD | Sire Of Distinction |
| SOD | Skate Or Die |
| SOD | Sprint On Dirt |
| SOD | Steal Of the Draft |
| SODOS | Sum Of Defeated Opponents' Scores |
| SOFA | Shedfield Orienteering and Footslogging Association |
| SOG | Shots On Goal |