NSSN
| Acronym | Definition |
|---|---|
| NSSN | National Shop Stewards Network (UK) |
| NSSN | National Speed Sport News (motorsports journal; Harrisburg, NC) |
| NSSN | New Attack Submarine (Nuclear Propulsion) |
| NSSN | National Standards Systems Network |
| NSSN | National Shopping Service Network, LLC (Denver, CO) |
| NSSN | NATO Standard Stock Number |