| Abbreviation | Definition |
|---|---|
| SDPO | Site Defense Project Office |
| SDR | Small Development Requirement |
| SDR | Supply Discrepancy Report |
| SDR | Surrogate Data Radio |
| SDR | System Design Requirement |
| SDR | System Design Review |
| SDRB | Specification and Data Review Board |
| SDREN | Secure Defense Research and Engineering Network |
| SDRL | Sea Date Required to Load |
| SDRT | Supply Discrepancy Reports Team |
| SDS | Solution Development System |
| SDS | Standard Depot System |
| SDS | Strategic Defense Systems |
| SDSFIE | Spatial Data Standard for Facilities, Infrastructure and Environment |
| SDSG | Space Division Switching Group |
| SDSM | Space Division Switching Matrix |
| SDT | Signal Detection Theory |
| SDT | Software Development Test |
| SDTC | Standard Duty Title Code |
| SDTF | Standard Duty Title File |