| NSU | National Socialist Underground 
| Others |
| NSU | National Support Unit
| Others |
| NSU | National Supporters Union
| Others |
| NSU | Navy Services Uniform
| Others |
| NSU | Naza Sutera Underground
| Others |
| NSU | Neckar S Ulm
| Others |
| NSU | Neckarsulm Strickmaschinen Union
| Others |
| NSU | Networking Support Utilities
| Others |
| NSU | Neurosurgical unit
| Others |
| NSU | New Sport Utilitymobile
| Others |
| NSU | Next Syntactic Unit
| Others |
| NSU | Nicholls State University
| Others |
| NSU | Nikkei Student Union
| Others |
| NSU | No Schur Update
| Others |
| NSU | No Such University
| Others |
| NSU | Noch Sehr Unvollkommen
| Others |
| NSU | Nokia Software Updater
| Others |
| NSU | Non Shared Update
| Others |
| NSU | Non Specific Urethritis
| Others |
| NSU | Nonspecific urethritis
| Others |
| NSU | Nordic Summer University
| Others |
| NSU | Norfolk State University
| Others |
| NSU | North South University
| Others |
| NSU | Northeastern State University
| Others |
| NSU | Northern State University
| Others |
| NSU | Northern Superior Uplands
| Others |
| NSU | Northwestern State University
| Others |
| NSU | Not So Ugly
| Others |
| NSU | Nova Southeastern University
| Others |
| NSU | Novosibirsk State University
| Others |