| 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 |