| Abbreviation | Definition |
|---|---|
| D | Drift |
| D | Driver |
| D&D | Denial and Deception |
| D&F | Determination and Findings |
| D&F | Determinations and Findings |
| D&M | Detection and Monitoring |
| D&O | Doctrinal and Organizational |
| D&R | Debrief and Reintegrate |
| D&R | Demobilization and Reintegration |
| D&SABL | Depth and Simultaneous Attack Battle Lab |
| D&V | Demonstration and Validation |
| D/C | Down-Converter |
| D/CI&SP | Director, Counter-Intelligence and Security Programs |
| D/CIA | Director, Central Intelligence Agency |
| D/D | Demilitarization and Disposal life cycle phase |
| D/V | Demonstration and Validation life cycle phase |
| D2 | Data Distribution |
| D2O | Deuterium Oxide (Heavy Water) |
| D3 | Decide, Detect, Deliver |
| D3A | Decide, Detect, Deliver, and Assess |