| Acronym | Definition |
|---|
| NSSP | National Shellfish Sanitation Program |
| NSSP | National Strategy for Suicide Prevention |
| NSSP | Next Steps in Strategic Partnership (US-India bilateral diplomacy initative) |
| NSSP | Nava Sama Samaja Party |
| NSSP | National Security Studies Program |
| NSSP | National Student Safety Program |
| NSSP | National Survey of Seismic Protection |
| NSSP | Nippon Steel & Sumikin Pipe (Japan) |
| NSSP | National Science Scholars Program (US Department of Education) |
| NSSP | Non-Standard Special Provisions |
| NSSP | Network Service Support Point |
| NSSP | Navy Secondary Stock Point |
| NSSP | Navy Standard Signal Processor |
| NSSP | Non-Susceptible Streptococcus Pneumoniae |
| NSSP | Naval Support System Philadelphia |
| NSSP | Normal Size, Shape, and Position (medical) |