| Abbreviation | Definition |
|---|---|
| DCS | Digital Communications System |
| DCS | Digital Crosspoint Switch |
| DCSIM | Distributed Control System Interface Module |
| DCT | Digital Cable Transceiver |
| DCUI | Direct Console User Interface |
| DDC | Data Display Channel |
| DDC | Data Domain Controller |
| DDC | Digital Data Channel |
| DDD | Dynamic Distributed Data |
| DDF | Data Distribution Frame |
| DDI | DNS, DHCP IP Address Management |
| DDI | DNS, DHCP & IP Address Management |
| DDN | Digital Data Network |
| DDNS | Dynamic Domain Name Server |
| DDP | Datagram Delivery Protocol |
| DDR | Dynamic Document Review |
| DDS | Digital Data Storage |
| DDT | Digital Data Transfer |
| DDTM | Digital Data Transmission Mode |
| DE | Desktop Environment |