| Abbreviation | Definition |
|---|---|
| SKP | Size of Kappa Plaques |
| SKR | SKeleton Rack |
| SKU | Stock Kiping Unit |
| SL | Self Locking |
| SL | Slim Line |
| SL | Stackelberg Leader |
| SL | Straight Ladder |
| SL | Super Long |
| SLA | Stereo Lithography Apparatus |
| SLAB | Sealed Lead Acid Battery |
| SLC | Suspended Looping Coaster |
| SLC | Synthetic Lubricant Concentrate |
| SLCO | Saudi Light Crude Oil |
| SLE | Soft Light Easy |
| SLED | Sentry Longitudinal Energy Dissipater |
| SLJ | Series Locking Jaw System |
| SLMP | Stabilized Lithium Metal Powder |
| SLN | Self Locking Nut |
| SLP | Several Large Pipes |
| SLRB | Scoop Loader Rock Bucket |