| NSW | Narud Stokke Wiig 
| Others |
| NSW | National Security Workshop
| Others |
| NSW | National Service Week
| Others |
| NSW | National Single Window
| Others |
| NSW | National Software Works
| Others |
| NSW | National Sporting Weekend
| Others |
| NSW | Natural Sea Water
| Others |
| NSW | Natural Spring Water
| Others |
| NSW | Naval Special Warfare
| Others |
| NSW | Navy Special Warfare
| Others |
| NSW | Nebelscheinwerfer
| Others |
| NSW | Negative Slow Wave
| Others |
| NSW | Nest Speed Weaponry
| Others |
| NSW | Network Science Workshop
| Others |
| NSW | Network Setup Wizard
| Others |
| NSW | Neutral Position Switch
| Others |
| NSW | New South Wales, Australia
| Others |
| NSW | New South West
| Others |
| NSW | Newcastle Sydney and Wollongong
| Others |
| NSW | Newcastle Sydney Wollongong
| Others |
| NSW | Newcastle, Sydney, and Wollongong
| Others |
| NSW | Newman Shanks and Williams
| Others |
| NSW | Newman-Shanks-Williams prime number
| Others |
| NSW | Nike Sports Wear
| Others |
| NSW | Nike Sportswear
| Others |
| NSW | Nil Significant Weather
| Others |
| NSW | Nippon SystemWare Company
| Others |
| NSW | No Significant Weather
| Others |
| NSW | Nominal Size of Wire
| Others |
| NSW | Non Specific Work
| Others |
| NSW | North Shore Wheelers
| Others |
| NSW | North Shore Whingers
| Others |
| NSW | North Star Wholesale
| Others |
| NSW | Norton Safe Web
| Others |
| NSW | Norton Space Wizard
| Others |
| NSW | Norton System Works
| Others |
| NSW | NSP (Network Signal Processor) Status Word
| Others |
| NSW | NSP Status Word
| Others |