| Acronym | Definition |
|---|
| NSIP | Nationally Significant Infrastructure Project (UK) |
| NSIP | Nvidia Stable Image Program |
| NSIP | Nonlinear Signal and Image Processing (workshop) |
| NSIP | nonspecific interstitial pneumonia |
| NSIP | National Streamflow Information Program (USGS) |
| NSIP | NASA Student Involvement Program |
| NSIP | National Stations Improvement Programme (UK) |
| NSIP | NATO Security Investment Program |
| NSIP | National Sheep Improvement Program |
| NSIP | National SAM (School Administratin Manager) Innovation Project |
| NSIP | Network Service Over Internet Protocol (filter) |
| NSIP | National Surgical Infection Prevention |
| NSIP | Network Security Improvement Program |
| NSIP | Nutrition Service Incentive Program |
| NSIP | Netherlands Society of Investment Professionals |
| NSIP | Netscaler Internet Protocol (Citrix Access Gateway management IP address) |
| NSIP | National Senior Intelligence Program |