| eCMS | e-Case Management System 
| Others |
| ECMS | Earls Court Motor Show
| Others |
| ECMS | Early Childhood Management Services
| Others |
| ECMS | East Carolina Motor Speedway
| Others |
| ECMS | East Cary Middle School
| Others |
| ECMS | East Central Middle School
| Others |
| ECMS | East Coast Mechanical Services (Brisbane)
| Others |
| ECMS | East Cobb Middle School
| Others |
| ECMS | East Coweta Middle School
| Others |
| ECMS | Eastman Community Music School
| Others |
| ECMS | Edmonson County Middle School
| Others |
| ECMS | Effingham County Middle School
| Others |
| ECMS | Egyptian Company for Mobile Services
| Others |
| ECMS | El Cerrito Middle School
| Others |
| eCMS | Electronic Contract Management System
| Others |
| ECMS | Electronic Copyright Management Systems
| Others |
| ECMS | Electronic Customer Management System
| Others |
| ECMS | Elizabeth City Middle School
| Others |
| ECMS | Emerald Coast Middle School
| Others |
| ECMS | Emmanuel College Music Society
| Others |
| eCMS | Encyclopedia Content Management System
| Others |
| ECMS | Engineering and Construction Management
| Others |
| ECMS | Engineering and Construction Management System
| Others |
| ECMS | Engineering, Computer, and Mathematical Sciences
| Others |
| ECMS | Enterprise Content Management System
| Others |
| ECMS | Enterprise Content Management Systeme
| Others |
| ECMS | Enterprise Contract Management System
| Others |
| ECMS | Entrust Certificate Management Service
| Others |
| ECMS | Environmental and Construction Management Services, Inc.
| Others |
| ECMS | Environmental Charter Middle School
| Others |
| ECMS | Environmental Compliance Management Services
| Others |
| ECMS | Environmental Compliance Management System
| Others |
| ECMS | Ephraim Curtis Middle School
| Others |
| ECMS | Equivalent Consumption Minimization Strategy
| Others |
| ECMS | Ericsson Customer Management System
| Others |
| ECMS | Esperero Canyon Middle School
| Others |
| ECMS | Essex County Medical Society
| Others |
| ECMS | European Conference on Mineralogy and Spectroscopy
| Others |
| ECMS | European Council for Modelling and Simulation
| Others |