| Acronym | Definition |
|---|
| EWIS➣Emergency Warning and Intercommunication System (alarm network) |
| EWIS➣East-West-Information Service (metainformation platform; Eastern Europe) |
| EWIS➣Electrical Wiring Interconnection System (aviation) |
| EWIS➣External Wall Insulation System |
| EWIS➣Enterprise-Wide Information System |
| EWIS➣Electronic Warfare Information System |