| Abbreviation | Definition |
|---|---|
| STE | Special Touring Edition |
| STEP | Septic Tank Effluent Pump |
| STEP | Standard for The Exchange of Product model data (ISO 10303) |
| STI | Sport Turbo Injection |
| STIR | Seek To Improve Reliability |
| STK | Strake |
| STKM | Malco HVAC Starter Kit with Tool Box |
| STKR | Sticker |
| STL | Snug Tite Lock |
| STLB | STeel Long Bell nails |
| STLW | Skagen Titanium Leather White watch |
| STMP | Stone Tile And Masonry Protector |
| STOP | Stopping Tobacco Organizations and Products |
| STP | Studebaker Tested Product |
| STP | Submersible Turbine Pump |
| STPG | Structural Timber Products Guide |
| STQ | Safe T Quake Shut-Off Valves |
| STS | Single Tine Separator |
| STS | Straight Tip Star |
| STSC | Single Toggle Switch Cover |