| Abbreviation | Definition |
|---|---|
| DEL | Data Evaluation Laboratory |
| DEL | DELiver |
| DEL | Deorbit, Entry, and Landing |
| Delta-T | Difference in Temperature |
| DEM | DEModulator |
| DEMOD | DEMODulate |
| DEORB | DE-ORBit |
| DEPL | DEPLoy |
| DEPRESS | DE-PRESSurize |
| DER | Drawing Error Report |
| DERIGID | DE-RIGIDize |
| DES | Data Exchange System |
| DES | DEScend |
| DES | Display Equipment Status |
| DESAT | DESATurated |
| DESC | DESCent |
| DESIG | DESIGnate |
| DESPOT | DESign Performance OpTimization |
| DET | DETail |
| DET | DETent |