| Abbreviation | Definition |
|---|---|
| SDB | Systems Design Board |
| SDBN | Selective Directed Broadcast Mode |
| SDC | Sample Data Collection |
| SDC | Standing Down Center |
| SDC | Submersible Decompression Chamber |
| SDC | System Decision Papers |
| SDCP | Software Distribution Compliance Policy |
| SDD | Software Data Dictionary |
| SDD | Software Design Document |
| SDD | System Development and Demonstration |
| SDDC | Surface Deployment and Distribution Command |
| SDDCTEA | Surface Deployment and Distribution Command Transportation Engineering Agency |
| SDDD | Software Detailed Design Document |
| SDDM | Secretary of Defense Decision Memorandum |
| SDE | Secure Data Exchange |
| SDE | Signal Distribution Equipment |
| SDF | Self Defense Force |
| SDF | Self Defense Forces |
| SDF | Software Development Facility |
| SDF | Software Development File |