| Acronym | Definition |
|---|
| NDSI➣Normalized Difference Snow Index |
| NDSI➣Napier Diversified Services, Inc. (Macon, GA) |
| NDSI➣National Defence Security Instructions (Canadian Department of National Defence) |
| NDSI➣Network Data Solutions Inc. (San Diego, CA) |
| NDSI➣Nicholas Data Services Inc. (Clearwater, FL) |
| NDSI➣Near-Drowning Severity Index |