| Acronym | Definition |
|---|
| NSIF➣Network Services and Integration Forum |
| NSIF➣Nicholls Spinal Injury Foundation (UK) |
| NSIF➣NATO Secondary Imagery Format |
| NSIF➣National Spatial Information Framework (geographical information; South Africa) |
| NSIF➣National Swine Improvement Federation (est. 1975; Knoxville, Tennessee) |
| NSIF➣NATO Special Intelligence Facility |
| NSIF➣Network and Service Integration Forum (ATIS) |
| NSIF➣National Social Investment Fund (World Bank; Tajikistan) |