| item | description | category | filter | more on... |
| NSSN | NAPMA School Support Network | Radio Stations |
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| NSSN | National Social Security Number | Governmental/US Gov. |
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| NSSN | National Standards Systems Network | Uncategorized |
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| NSSN | National Standards Systems Network | Governmental/US Gov. |
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| NSSN | New Nuclear-powered Attack Submarine | Misc/Ship Types |
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