| Acronym | Definition |
|---|
| OWSC➣Oman Wastewater Services Company |
| OWSC➣Office of the Washington State Climatologist (Seattle, Washington) |
| OWSC➣Optimum Write Speed Control (compact disc recording) |
| OWSC➣Old Wesleyites Sports Club (est. 1941; Sri Lanka) |
| OWSC➣Oscillating Wave Surge Converter (wave energy device) |
| OWSC➣Omaha Westside Swim Club (Omaha, NE) |