| Abbreviation | Definition |
|---|---|
| DARC | Deutscher Amateur Radio Club |
| DARS | Digital Audio Radio Service |
| DAS | Dead Air Space |
| DB | Deutsche Bahn |
| DBDM | Dual Band Dual Mode |
| DBDP | Dual-Band Dual-Polar |
| DBDPA | Dual Band Dual Polar Antenna |
| DBDT | Dual-Band Desk-Top |
| DBDTA | Dual-Band Desk-Top Antenna |
| dBm | DeciBel relative to one milliWatt |
| DCARA | Denton County Amateur Radio Association |
| DCD | Data Carrier Detect |
| DCM | Digital Carrier Module |
| DCS | Digital-Coded Squelch |
| DDA | Digital Directional Antenna |
| DE | Driven Element |
| DFQ | Dead Full Quieting |
| DG | Darling Girl |
| DiDiDit--DA-DA-DAH--DiDiDit | Official International Morse Radio Telegraphy or Light Signal 0r Audio Signal for Danger Life/Death Emergency Signal |
| DIT | Morse code DOT |