| NSSN | National Standards Systems Network | 国家标准系统网络 |
| NSSN | New Nuclear-powered Attack Submarine | 新型核动力攻击潜艇 |
| NSSN | National Social Security Number | 国家社会保障号码 |
| NSSN | New Attack Submarine (Nuclear Propulsion) | 新型攻击潜艇（核推进） |
| NSSN | NATO Standard Stock Number | 北约标准库存编号 |
| NSSN | NAPMA School Support Network | NAPMA学校支持网络 |