ECIO
| 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) |