| Abbreviation | Definition |
|---|---|
| ECP | Encryption Control Protocol |
| ECP | Enhanced Communication Port |
| ECPA | Electronic Communications Privacy Act 1986 |
| ECS | Enterprise Control Station |
| ECS | Event Correlation Services |
| ECT | ECN (Explicit Congestion Notification) Capable Transport |
| ECT | Extended Control Timing |
| ECW | Enhanced Compression Wavelet |
| ED | Early Deployment |
| EDA | Enterprise Data Access |
| EDACS | Enhanced Digital Access Communications System |
| EDAS | Environment for Distributed Adaptive Services |
| EDC | External Domain Controller |
| EDD | Ethernet Demarcation Device |
| EDF | European Data Format |
| EDGE | Enhanced Data for GSM Evolution |
| EDGE | Exploring Dynamic Groupware Environments |
| EDN | Executive Development Network |
| EDNS | Extension mechanisms for the Domain Name System protocol |
| EDRM | Enterprise Digital Rights Management |