| Abbreviation | Definition |
|---|---|
| DSI | Deep Space Intruder |
| DSI | Dual Sequential Ignition |
| DSM | Data Systems Manager |
| DSM | Deep Space Maneuver |
| DSN | Deep Space Network |
| DSU | Deep Space Unit |
| DTE | Dover Thrift Edition |
| DTER | Draft Technical Evaluation Report |
| DTO | Development Test Objective |
| DTP | Detail Test Plan |
| DTPR | Detailed Test PRocedures |
| DTRD | Development Test Requirements Document |
| DTS | Data Transmission System |
| DTS | Device Technology And Safety |
| DU | Display Unit |
| DUA | Digital Uplink Assembly |
| DUC | Digital Uplink Command |
| DUM | DUMmy |
| DUN | Dial-Up Networking |
| DUPLX | DUPLeX |