| Acronym | Definition |
|---|
| ECLS | Environmental Control and Life Support |
| ECLS | School of Education, Communication and Language Sciences (Newcastle University; Newcastle upon Tyne, England, UK) |
| ECLS | European China Law Studies Association (EU) |
| ECLS | Extracorporeal Life Support |
| ECLS | Étudiants contre le Sida (French: Students against AIDS) |
| ECLS | European Charter of Local Self-Government (Congress of the Council of Europe) |
| ECLS | Espace Conditionnement Logistique Service (French: Packaging Logistics Service Area) |
| ECLS | Early Childhood Longitudinal Studies |
| ECLS | Eau Claire Lutheran School (Eau Claire, Wisconsin) |