| Abbreviation | Definition |
|---|---|
| SLP | Socit de Linguistique de Paris |
| SLP | Socit Luxembourgeoise de Psychologie |
| SLQS | St Louis QRP Society |
| SLRCS | Sierra Leone Red Cross Society |
| SLS | Smoking Loud Society |
| SLS | Society of Laparoendoscopic Surgeons |
| SLS | Svenska Läkaresällskapet |
| SLS | Svenska Lkaresllskapet |
| SLS | Swedish Medical Society |
| SLSA | Society for Literature, Science, and the Arts |
| SLSD | Society for Leadership Skills Development |
| SLSI | Society of Land Surveyors of Iowa |
| SLSLS | Sydney Live Steam Locomotive Society |
| SLSP | Sri Lanka Society of Physiotherapy |
| SLSS | Singapore Life Saving Society |
| SLTB | Society for Low Temperature Biology |
| SLU | Society for Learning Unlimited |
| SMA | Society for Medical Anthropology |
| SMA | Society of Municipal Arborists |
| SMAE | Society of Model Aeronautical |