| Acronym | Definition |
|---|
| NSSS➣Nuclear Steam Supply System |
| NSSS➣National Security Space Strategy (US DoD) |
| NSSS➣Nantyr Shores Secondary School (Aclona, ON, Canada) |
| NSSS➣Nursing Student Satisfaction Scale (study) |
| NSSS➣National Structural Steelwork Specification |
| NSSS➣North Surrey Secondary School (Surrey, BC, Canada) |
| NSSS➣National Salmonella Surveillance System |
| NSSS➣Naval Space Surveillance System |
| NSSS➣National Strategic Satellite Communications System |