| Acronym | Definition |
|---|
| EWSC➣Essen-Werdener Segel-Club (German: Essen Werden Sailing Club) |
| EWSC➣East West Securities Co. (San Francisco, CA) |
| EWSC➣Eastern Wisconsin Stock Car (Plymouth, WI) |
| EWSC➣East Washington School Corporation (Perkin, IN) |
| EWSC➣Excess Water Storage Capacity |