| item | description | category | filter | more on... |
| NSN | National Security Network | Governmental/US Gov. |
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| NSN | National Stock Number | Governmental/Military |
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| NSN | National Stock Number | Governmental/NASA |
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| NSN | National Stock Number | Misc/USPS |
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| NSN | Native Sovereign Nation | Governmental/US Gov. |
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| NSN | Nelson New Zealand | Regional/Airport Codes |
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| NSN | Never Say Never | Chat and Slang |
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| NSN | Nokia Siemens Networks | Business/Firms |
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| NSN | NorthStarNet | Business/Firms |
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