| NAFTA-TAA |
- North American Free Trade Agreement – Transitional Adjustment Assistance |
| NAICS |
- North American Industry Classification System |
| NFDL |
- Non-Fatal Days Lost |
| NGO |
- Non-Governmental Organization |
| NIOSH |
- National Institute for Occupational Safety and Health |
| NLSY |
- National Longitudinal Survey of Youth |
| NMHPA |
- Newborns' and Mothers' Health Protection Act |
| NOGA |
- Notice of Grant Award |
| NORA |
- National Occupational Research Agenda |
| NSTWO |
- National School-to-Work Office |
| NVTI |
- National Veterans' Training Institute |
