| Abbreviation | Definition |
|---|---|
| SHG | Super High Grade |
| SHQ | Super High Quality |
| SI | Soft Intermediate |
| SIB | Single Ignition Box |
| SIOC | Ship in Original Carton |
| SION | Standard Input Output Norms |
| SIR | Supplemental Inflatable Restraint |
| SIS | Silicone Integrated System |
| SIV | Sieve |
| SJ | Swing Joint |
| SJA | Swing Joint Assembly |
| SJM | StJude Masters Series Valve |
| SJP | Sprouting Jar, Pint size |
| SJQ | Sprouting Jar, Quart size |
| SJU-17 | Seat eJection Unit 17 (Aircraft Ejection Seat) |
| SK | Swiss Knife |
| SKD | Semi-Knocked Down |
| SKH | SKeletonized Handle |
| SKH | Stonebrook Knee Highs |
| SKMW | SlowaKische MietWagen |