| Abbreviation | Definition |
|---|---|
| ECM | Electronically Commutated Motor |
| ECMV | Electronic Controlled Modulation Valve |
| ECN | Electronic Communication Networks |
| ECN | Electronic Communications Networks |
| ECN | Electronic Component News |
| ECN | Electronic Contract Note |
| ECN | Electronic Course Network |
| ECN | Electronic Crossing Network |
| ECN | Engineering Change Notice |
| ECO | Electronic Central Office |
| ECO | Electronic Copyright |
| ECO | Electronic Copyright Office |
| ECO | Engineering Change Order |
| ECOC | Electronic Chain of Custody |
| ECOE | Electronic Confirmation Of Enrolment |
| ECOI | Electronic Conflict Of Interest |
| ECOM | Electronic Computer Originated Mail |
| ECOT | Electronic Claims Office Transactions |
| ECOT | Electronic Classroom of Tomorrow |
| ECP | Electric Control Posture |