| EMSA | Eagle Mountain Soccer Association 
| Others |
| EMSA | Eastern Multihull Sailing Association
| Others |
| EMSA | Education and Migration Services Australia
| Others |
| EMSA | Egyptian Medical Students' Association
| Others |
| EMSA | Eight Mile Sprint Association
| Others |
| EMSA | Electron Microscopy Society of America
| Others |
| EMSA | Electrophoretic Mobility Shift Assay
| Others |
| EMSA | Electrophoretic Mobility Shift Assays
| Others |
| EMSA | Emergency Medical Services Academy
| Others |
| EMSA | Emergency Medical Services Agency
| Others |
| EMSA | Emergency Medical Services Alliance
| Others |
| EMSA | Emergency Medical Services Authority
| Others |
| EMSA | Emsaelectrophoretic Mobility Shift Assay
| Others |
| EMSA | Enterprise Messaging Security Architecture
| Others |
| EMSA | Ethiopian Motor Sports Association
| Others |
| EMSA | Ethnic Minority Specific Action
| Others |
| EMSA | European Magnetic Sensors and Actuators
| Others |
| EMSA | European Maritime Safety Agency
| Others |
| EMSA | European Masters Sports Association
| Others |
| EMSA | European Medical Students Association
| Others |
| EMSA | European Medical Students' Association
| Others |
| EMSA | European Multiple System Atrophy
| Others |
| EMSA | External Measurement of Student Achievement
| Others |