| Abbreviation | Definition |
|---|---|
| ECHO | Enhanced Computer-to-Human Output |
| ECL | Extended Control Logic |
| ECM | Electronic Code Machine |
| ECM | Error Correction Mechanism |
| ECN | Engineering Change Notice |
| ECP | Embedded Controller Program |
| ECP | Enhanced Capabilities Port |
| ECP | Enhanced Capability Port |
| ECR | Engineering Change Request |
| ECS | Expert Control System |
| ECSM | Effective Current Source Model |
| ECUS | EC2 Compute Units |
| ED | Electro-Deposited |
| ED | Electrostatic Deflector |
| ED | Enclosed Dust |
| ED | Engineering Design |
| ED | Extra-high Density |
| EDA | Enterprise Digital Assistant |
| EDC | Electronic Digital Computer |
| EDCS | Electrical Drive and Control System |