WGSI
| Acronym | Definition |
|---|---|
| WGSI | Water Group Systems International (San Diego, CA) |
| WGSI | Westmoreland Glass Society, Inc. (New York) |
| WGSI | Westcoast Gas Services, Inc. (various locations) |
| WGSI | World GPS (Global Positioning System) Solutions, Inc. (Stafford, TX) |
| WGSI | Wang Government Services, Inc. (Annapolis Junction, MD) |
| WGSI | Working Group on Sea Ice |