| Acronym | Definition |
|---|
| WSSI | World Seismic Safety Initiative |
| WSSI | Wetland Studies and Solutions, Inc. |
| WSSI | Wyoming SBIR/STTR Initiative |
| WSSI | Watershed Science Institute (Natural Resources Conservation Service, US Department of Agriculture) |
| WSSI | Wireless Site Services, Inc. (Lincoln, NE) |
| WSSI | Web Side Story, Inc. (stock symbol) |
| WSSI | Washington Square Securities, Inc. (broker/dealer) |
| WSSI | Wood Stabilizing Specialists, International |
| WSSI | Wall Street Strategies, Inc. |
| WSSI | Water Ski Shows, Inc. |
| WSSI | Wilson Social Sciences Abstracts |
| WSSI | Western Scientific Services, Inc. |
| WSSI | Web Site Services, Inc. |
| WSSI | Water Safety Survival Instructor (USMC) |
| WSSI | Woman Staff Sergeant Instructor |
| WSSI | Weapons Storage Site Inspection |
| WSSI | Westinghouse Security Systems, Inc. |
| WSSI | Washington Ski and Snowboard Industries |
| WSSI | World Secondary Standard Instrument (calibration) |
| WSSI | Weekly Sales & Stock Intake |
| WSSI | Wisconsin Supplemental Security Income |
| WSSI | Western Steel Sales, Inc. |
| WSSI | Woodlake Sanitary Services, Inc. |
| WSSI | Winnebago Satellite Service, Inc. |