| NSAC | Nanotechnology Student Advisory Council 
| Others |
| NSAC | National Scientific Advisory Committee
| Others |
| NSAC | National Security Advisory Council
| Others |
| NSAC | National Senior Advisory Council
| Others |
| NSAC | National Sexual Assault Conference
| Others |
| NSAC | National Social Anxiety Center
| Others |
| NSAC | National Society for Autistic Children
| Others |
| NSAC | National Society of Accountants for Cooperatives
| Others |
| NSAC | National Society of Accountants for Cooperatives (USA)
| Others |
| NSAC | National Speed Awareness Course
| Others |
| NSAC | National Spiritualist Association of Churches
| Others |
| NSAC | National Student Advertising Competition
| Others |
| NSAC | National Sustainable Agriculture Coalition
| Others |
| NSAC | NATO Strategic Airlift Capability
| Others |
| NSAC | Nederlandse Studenten Alpen Club
| Others |
| NSAC | Nevada State Athletic Commission
| Others |
| NSAC | North Shore Aero Club
| Others |
| NSAC | North Suburban Aquatic Club
| Others |
| NSAC | Nova Scotia Agricultural College
| Others |
| NSAC | Nuclear Science Advisory Committee
| Others |