| Abbreviation | Definition |
|---|---|
| STLI | Statue of Liberty National Monument |
| STM | Safety Technology Management |
| STN | Surf The Net |
| STO | Spontaneous Time Off |
| STO | Stating The Obvious |
| STOF | Seminole Tribe of Florida |
| STOP | Safety Training Observation Program |
| STOP | Sit Temporarily On Point |
| STORM | Service To Others Really Matters |
| STP | Stupid Trump Presidency |
| STRIPS | Separately Tradable Registered Interest and Principal Securities |
| STSL | Strategic Thinking and Strategic Leadership |
| STSL | Strategic Thinking and Strategic Leadership |
| STT | State, Territory or Tribe |
| STUN | Scream Towards the Uprising of Non-conformity |
| STUN | Sub Terranean Underground Network |
| STV | Single Transferable Voting |
| SUDOC | Superintendent of Documents |
| SUDS | Special Uses Data System |
| SUG | Suggestion |