| Abbreviation | Definition |
|---|---|
| CZT | Chirp Z-Transform |
| D | Data Channel |
| D | Digital |
| D | Diode |
| D | Dynamic |
| D | form D (make-before-break) contacts |
| D/A | Digital-to-Analog converter |
| D/B | Die Bonding |
| D/I | Develop/ Inspect |
| DA | Dielectric Absorption |
| DA | Digital to Analog |
| DA | Distributed Amplifier |
| DA-15 | 15-pin D-SUB (series D subminiature) connector |
| DAB | Designated Audit Body |
| DAC | Digital-to-Analog Converter |
| DAC | Dual Attached Concentrator |
| DACCS | Digital Access Cross Connect System |
| DAD | Diode Array Detector |
| DAE | Digital Analog Extraction |
| DAM | Digital Analog Media |