| Acronym | Definition |
|---|
| ECIO➣Experiment Computer Input Output |
| ECIO➣European Conference on Integrated Optics |
| ECIO➣Export Credit Insurance Organization (est. 1988; Athens, Greece) |
| ECIO➣European Conference on Interventional Oncology |
| ECIO➣Executive Chief Information Officer (Arkansas) |
| ECIO➣Experiment Computer Input/Output (Spacelab) |