| Abbreviation | Definition |
|---|---|
| NARPP | National Asthma Education and Prevention Program |
| NARS | National Association of Radiation Survivors |
| NARSD | National Alliance for Research on Schizophrenia and Depression |
| NARUC | National Association of Regulatory Utility Commissioners |
| NAS | National Association of Seadogs |
| NAS | National Audubon Society |
| NAS | National Autistic Society |
| NASA | National Aggregate Stone Association |
| NASC | National Association of Student Councils |
| NASCC | National Association of Service and Conservation Corps |
| NASE | National Association for Self Esteem |
| NASF | Native American Scholarship Fund |
| NASF | Naval Academy Sailing Foundation |
| NASF | North Atlantic Salmon Fund |
| NASI | National Audubon Society, Inc. |
| NASM | National Association of Schools of Music |
| NASN | National Association of School Nurses |
| NASP | National Association of Safety Professionals |
| NASR | National Association for Search and Rescue |
| NASRA | National Association of State Retirement Administrators |