NSSB
| Acronym | Definition |
|---|---|
| NSSB | Nippon Steel & Sumikin Bussan (various locations) |
| NSSB | National Skills Standards Board |
| NSSB | Network Support Services Branch (Internet service provider; Hawaii) |
| NSSB | National Social Services Board (Department of Finance; Ireland) |
| NSSB | Nikko Salomon Smith Barney (Japan) |
| NSSB | North Suburban Symphonic Band |
| NSSB | North Side State Bank (Rock Springs, WY) |
| NSSB | Naval Supply Support Battalion (US Navy) |