| NSIP | NASA Student Involvement Program 
| Others |
| NSIP | NASA Student Involvement Project
| Others |
| NSIP | National Seafood Inspection Program
| Others |
| NSIP | National Security Internship Program
| Others |
| NSIP | National Service Inclusion Project
| Others |
| NSIP | National Sheep Improvement Program
| Others |
| NSIP | National Stations Improvement Programme
| Others |
| NSIP | National Streamflow Information Program
| Others |
| NSIP | Nationally Significant Infrastructure Project
| Others |
| NSIP | Nationally Significant Infrastructure Projects
| Others |
| NSIP | NATO Security and Investment Program
| Others |
| NSIP | New Student Immunization Program
| Others |
| NSIP | Non specific interstitial pneumonia
| Others |
| NSIP | Non-Specific Interstitial Pneumonia
| Others |
| NSIP | Nonlinear Signal and Image Processing
| Others |
| NSIP | Nutrition Services Incentive Program
| Others |
| NSIP | Nvidia Stable Image Program
| Others |