| Abbreviation | Definition |
|---|---|
| SMV | Swivel Milling Vice |
| SNA | Still Not Activated |
| SNES | Super Nintendo Entertainment System |
| SNIF | Sexy New Intelligent Fragrance |
| SNIX | Single Noise Interference Xterminator |
| SNPD | Strategic New Product Development |
| SNUF | Special Needs Uncle Fred |
| SO | Second Order |
| SOB | Scarves of Boston |
| SOC | Shipper Owned Container |
| SOD | Super Optical Device |
| SOE | Sony Online Enterprise |
| SOFQ | Stream of Flowers Quilts |
| SOGB | Special Occasion Gift Box |
| SOHC | Single OverHead Camshaft |
| SOL | Small Outline Large |
| SolarSIM | Solar Spectral Irradiance Meter |
| SOMBW | Sombreros White |
| SOP | Stick On Plate |
| SOS | Save Our Separator |