| Abbreviation | Definition |
|---|---|
| SDF | Software Development Folder |
| SDF | Standard Distance File |
| SDFD | Software Data Flow Diagram |
| SDFO | South Dakota Field Office |
| SDGT | Specially Designated Global Terrorist |
| SDI | Selective Dissemination of Information |
| SDI | Strategic Defense Initiative |
| SDI | Strategic Destruction And Infiltration |
| SDI | Strategic Deterrence Initiative |
| SDIO | Strategic Defense Initiative Organization |
| SDIR | Statement of Detailed Interoperability Requirement |
| SDK | Skin Decontaminating Kit |
| SDL | Smartcard Data Log |
| SDL | System Design Language |
| SDLC | Systems Development Life Cycle |
| SDLS | Satellite Data Link Standards |
| SDM | Selective Display Model |
| SDM | Service Decision Memorandum |
| SDM | Shut Down Maintenance |
| SDM | Small Deathmaps Maps |