| Abbreviation | Definition |
|---|---|
| SIRT | Serious Incident Response Team |
| SIS | Social Information Systems |
| SISG | Secrets Interagency Steering Group |
| SIT | Special Investigation Team |
| SITF | Staten Island Task Force |
| SJPD | San Jose Police Department |
| SJPU | Special Juvenile Police Unit |
| SJPU | Special Juvenile Police Units |
| SL | SearchLight |
| SLCP | Salt Lake City Police |
| SLP | Self-Loading Pistol |
| SLPA | Salt Lake Police Association |
| SLPD | SugarLand Police Department |
| SMART | Specific, Measurable, Achievable, Relevant, Time-framed |
| SmashandGrab | An event where thieves rob stores by quickly entering the store and breaking display cases, and stealing items and quickly leaving. |
| SMDR | Station Message Detail Records |
| SMET | Substance Misuse Engagement Team |
| SMG | Sub Machine Gun |
| SMIP | Senior Management Institute for Police |
| SMPA | Seoul Metropolitan Police Agency |