| Abbreviation | Definition |
|---|---|
| SDTG | Specially Designated Terrorist Group |
| SDU | Special Duties Unit |
| SDU | Stand-alone Display Unit |
| SDV | Sea-Air-Land Team (SEAL) Delivery Vehicle |
| SDV | SEAL Delivery Vehicle |
| SDV | Special Delivery Vehicle |
| SDV | Submerged Delivery Vehicle |
| SDV | Swimmer Delivery Vehicle |
| SDVAMC | San Diego Veterans Administration Medical Center |
| SDVOSB | Service- Disabled Veteran- Owned Small Business |
| SDVT | Seal Delivery Vehicle Team |
| SDX | Secure Document eXchange |
| SDX | Spatial Data Explorer |
| SDZ | Surface Danger Zone |
| SE | Scouting Experimental |
| SE | Self Erecting |
| SE | Site Exploitation |
| SE | Sniper Edition |
| SE | Special Equipment |
| SE | Spherical Error |