| Abbreviation | Definition |
|---|---|
| DEL | Donation Electronic Lunfage |
| DEM | Defect Estimation Model |
| DEMF | Detroit Electronic Music Festival |
| DEMS | Digital Electronic Messaging Service |
| DEMU | Diesel and Electric Modellers United |
| DEMU | Diesel Electric Multiple Unit |
| DEMU | Diesel Electric Multiple Units |
| DEMU | Driving Electronic Machine Unit |
| DEMUX | Demultiplexer |
| DEMUX | DE-MUltipleXer |
| DENC | Drive Electric Northern Colorado |
| DENC | Dual-digital ENCoder ststem |
| DENG | Digital Electronic News Gathering |
| DENISE | Digital Electronic Neohuman Intended for Scientific Exploration |
| DEP | Diesel Electric Propulsion |
| DEP | Diesel Exhaust Particulate |
| DEP | Digitital Electronic and Prinit |
| DEQ | Detroit Electronic Quarterly |
| DERD | Dielectric Resistivity Measured Down |
| DERH | Direct Electrical Resistance Heating |