| Abbreviation | Definition |
|---|---|
| EC | Element Contractor |
| EC | Engine Control |
| EC | Engine Cutoff |
| EC | Essentiality Code |
| EC | Events Controller |
| EC | Events Coupler |
| EC | Experiment Computer |
| ECA | Electronics Control Assembly |
| ECA | Engineering Change Analysis |
| ECA | Epoxy Curing Agent |
| ECAS | Experiment Computer Application Software |
| ECB | Event Control Block |
| ECB | Events Control Buffer |
| ECC | Engineering Change Control |
| ECC | Engineering Critical Component |
| ECCB | Engineering Change Control Board |
| ECCO | Earth Coincidence Control Office |
| ECD | Engineering Control Drawing |
| ECD | Estimated Completion Date |
| ECEP | Experiment Checkout Equipment Processor |