| Acronym | Definition |
|---|
| HSSD | Health and Social Services Department |
| HSSD | High Sensitivity Smoke Detector |
| HSSD | Howard-Suamico School District (Green Bay, WI) |
| HSSD | Hot Springs School District (Hot Springs Arkansas) |
| HSSD | Holly Springs School District (Holly Springs, Mississippi) |
| HSSD | Hospital Sterile Services Department |
| HSSD | High Sensitive Smoke Detector |
| HSSD | Hot Standby Space Diversity |
| HSSD | HyperSpace Secure Daemon |
| HSSD | Hispanic-Serving School District (various locations) |
| HSSD | High Speed Service Delivery |
| HSSD | Health Systems and Services Development |