| Abbreviation | Definition |
|---|---|
| SPEGL | short-term public emergency guidance level (NRC) |
| SPHR | Solidarity For Palestinian Human Rights |
| SPI | Special Public Interest |
| SPIC | Spanish People In Control |
| SPIKE | Specially Prepared Individuals For Key Events |
| SPIRIT | Simultaneous Paperless Imaging Retrieval Information Technology |
| SPL | Speed Power Longevity |
| SPM | Site Project Manager |
| SPM | Suspended Parliamentary Matter |
| SPMN | Software Program Managers Network |
| SPN | Special Paper Number |
| SPN | Sponsor Program Notice |
| Spon/Mon | sponsor/monitor |
| SPP | Statement Of Planning Policy |
| SPPC | Selective Placement Program Coordinator |
| SPQR | Some People Question Rules |
| SPR | Secret Periodic Reinvestigation |
| SPR | Strategic Political Reserve |
| SPRCC | Support Program to Respond to Climate Change |
| SPSS | Statistical Package For Social Sciences |