| Abbreviation | Definition |
|---|---|
| SKS | Same Key System |
| SKSK | Scary Kids Scaring Kids |
| SKWBN | Suburban Kids With Biblical Names (band) |
| SL | Secret Lover |
| SL | Song Layout |
| SL | Spanisches Liederbuch (German: Spanish Songbook) |
| SLAB | Slow, Loud, And Bangy |
| SLAM | Support for Local Artists and Musicians |
| SLAM | Supporting Local Alternative Music |
| SLASH | He is Saul Hudson. He is SO FREAKING HOT |
| SLASH | Slash is Saul Hudson |
| SLD | Seneca Land District of SPEBSQSA |
| SLD | Sound, stage Lighting, Disk jockey |
| SLLMF | Sebago Long Lake Music Festival |
| SLM | Saint Louis Music |
| SLME | St Louis Music Enterprises |
| SLMF | Seoul LIVE MUSIC Festa |
| SLO | Stanford's Laptop Orchestra |
| SLSO | St Louis Symphony Orchestra |
| SLTS | Smells Like Teen Spirit (a Nirvana hit) |