| EWIS | Early Warning Indicator System 
| Others |
| EWIS | East West Information Service
| Others |
| EWIS | Electrical Wiring Interconnect System
| Others |
| EWIS | Electrical Wiring Interconnection System
| Others |
| EWIS | Electrical Wiring Interconnection Systems
| Others |
| EWIS | Emergency Warning and Intercommunication System
| Others |
| EWIS | Emergency Warning Intercommunications System
| Others |
| EWIS | Enhanced Wiring Integrity System
| Others |
| EWIS | European Wind Integration Study
| Others |
| EWIS | European Workshops in International Studies
| Others |
| EWIS | External Walls Insulation Systems
| Others |
| EWIS | Wheat Information Service
| Others |