| Abbreviation | Definition |
|---|---|
| DCVR | Dispatchable Conservation Voltage Reduction |
| DD | Dolby Digital |
| DD | Double Diode |
| DD-50 | 50-pin D-SUB (series D subminiature) connector |
| DDA | Digital Differential Analyzer |
| DDC | DC-to-DC (Direct Current) Converter |
| DDC | Digital Directivity Control |
| DDC | Digital Down-Converter |
| DDC | Direct Digital Control |
| DDCU | DC-to-DC (Direct Current) Converter Unit |
| DDE | digital diesel electronics |
| DDEC | Detroit Diesel Electronic Control |
| DDEC | Detroit Diesel Electronic Controls |
| DDFD | Decorrelating Decision Feedback Detector |
| DDL | Device Description Language |
| DDM | Data Display Module |
| DDMS | Defect Data Management System |
| DDPS | Desktop Digital Photogrammetry System |
| DDS | Dedicated Data Set |
| DDS | Direct Digital Signal |