| Abbreviation | Definition |
|---|---|
| SIS | strategic intelligence system |
| SIS | supplier information system |
| SIS | supplies information service |
| SIS | Surgical Information Systems |
| SIS | This term got 9 hits on 20.10.2011 (with the added keyword NHS), all from lists of acronyms. It appears likely that this term has been retired. |
| SISTC | Selection into Surgical Training Centres |
| SISTC | This term had 4 hits on 19.10.2011, and is thus assumed to have fallen into disuse |
| SITF | Social Investment Task Force (final report, 2010) |
| SLA | slide latex agglutination |
| SLA | somatomedin-like activity |
| SLA | surfactant-like activity |
| SLE | seizure-like events |
| SLE | Service Line Economics |
| SLE | slit lamp examination |
| SLE | St Louis encephalitis |
| SLE | stress life event |
| SLI | secretin-like immunoreactivity |
| SLI | selective lymphoid irradiation |
| SLI | serotonin-like immunoreactivity |
| SLI | somatostatin-like immunoreactivity |