| Abbreviation | Definition |
|---|---|
| SDH | System Definition Handbook |
| SDH | System Development Handbook |
| SDI | Space Development Information |
| SDIF | Software Development and Integration Facility |
| SDL | Software Development Laboratory |
| SDL | Standard Distribution List |
| SDM | Secondary Deployment Mechanism |
| SDM | Shuttle Data Management |
| SDM | Subsystem Design Manuals |
| SDM | System Definition Manual |
| SDM | System Design Manual |
| SDMU | Serial Data Management Unit |
| SDN | Software Development Note |
| SDO | Solar Dynamics Observatory |
| SDP | Shuttle Data Processor |
| SDP | Site Data Processor |
| SDP | Supplier Data Package |
| SDPC | Shuttle Data Processing Complex |
| SDPF | Sensor Data Processing Facility |
| SDR | Space Division Regulation |