| Abbreviation | Definition |
|---|---|
| NUSU | Neptune Orient Lines Limited |
| NVCX | Nevada Cement |
| NVCX | Nevada Cement Company |
| NVGU | Nova Gas Technologies,Inc |
| NVPX | Nevada Power |
| NVPX | Nevada Power Company |
| NVR | Northern Vermont Railroad |
| NVRR | Napa Valley Railroad |
| NVRR | NAPA Valley Railroad Company |
| NW | Norfolk and Western Railway (Norfolk Southern) |
| NW | Norfolk Southern Railway Company |
| NWAX | National Wax (BP Global Special Products) |
| NWAX | National Wax Company |
| NWCX | Northwest Container Services |
| NWCX | Northwest Container Services Incorporated |
| NWGX | Gorhams Inc. |
| NWGX | Gorham's Incorporated |
| NWLX | Nationwide Locomotive Service |
| NWP | Northwestern Pacific Railroad (Union Pacific Railroad) |
| NWP | Northwestern Pacific Railroad Company |