| Acronym | Definition |
|---|
| ECAS➣Escuela de Contadores Auditores de Santiago (Spanish: Auditors Accountants School of Santiago; Santiago, Chile) |
| ECAS➣Epidemiological Catchment Area Study (psychiatric study) |
| ECAS➣Electronically Controlled Air Suspension |
| ECAS➣Environmental Compliance Assessment System |
| ECAS➣Emergency Committee of Atomic Scientists (est. 1946) |
| ECAS➣Eberly College of Arts and Sciences (West Virginia University) |
| ECAS➣Eight Color Asteroid Survey |
| ECAS➣Executive Committee of the Academic Senate (various schools) |
| ECAS➣Emergency Close Air Support |
| ECAS➣Entreprise de Chauffage Automatique et Sanitaire (French: Automatic Heating and Sanitary Company) |
| ECAS➣Expressions Culture et Art Scénique (French: Scenic Art and Culture Expressions) |
| ECAS➣East Coast Aviation Supply |
| ECAS➣European Center of Adaptive Systems |
| ECAS➣Euro-Citizens' Action Service |
| ECAS➣Electronic Commerce Authentication System (Verisign, Inc.) |
| ECAS➣ESSX Customer Administration Service |
| ECAS➣Enhanced Cost Accounting System |
| ECAS➣External Compliance and Assessment System |
| ECAS➣Elmira-Corning Astronomical Society |
| ECAS➣Engine/System Crew Alerting System |
| ECAS➣Eddie Cantor Appreciation Society |
| ECAS➣Expertise Conseil Audit Stratégie (French: Audit Strategy Expertise Council) |
| ECAS➣Electronic Customs Automation System (Bahrain) |
| ECAS➣Eisenhower Center for American Studies (University of New Orleans) |
| ECAS➣East Coast All Stars (band) |