| NAS | nasal; National Academy of Sciences; National Association of Sanitarians; neonatal airleak syndrome; neuroallergic syndrome; no added salt |
|---|---|
| NAS-NRC | National Academy of Science-National Research Council |
| NASA | National Aeronautics and Space Administration |
| NASD | National Association of Schools of Dance |
| NASE | National Association for the Study of Epilepsy |
| NASEAN | National Association for State Enrolled Assistant Nurses |
| NASHS | National Adolescent Student Health Survey |
| NaSIMM | National Study of Internal Medicine Manpower |
| NASM | Naval Aviation School of Medicine |
| NASW | National Association of Social Workers |