| Abbreviation | Definition |
|---|---|
| NRC | Noise Reduction Coefficient |
| NRC | Non-Reusable Container |
| NRCB | National Railway Company of Belgium |
| NROA | Non Rev Other Airline |
| NROA | Non Revenue Other Airline |
| NRRP | National Roads Rehabilitation Project |
| NRSB | National Railway Safety Board |
| NRT | National Response Team |
| NRT | No Right Turn |
| NRTS | National Roads Telecommunications Services |
| NSBC | National Safety Belt Coalition |
| NSC | National Safety Council |
| NSDI | National Spatial Data Infrastructure |
| NSF | Non-Spin Flip |
| NSFC | Northern Sydney Freight Corridor |
| NSI | National Shipbuilding Initiative |
| NSIDH | National System of Interstate and Defense Highways |
| NSLV | Near Space Launch Vehicle |
| NSLV | North Star Launch Vehicle |
| NSPI | National Spatial Data Infrastructure |