| Abbreviation | Definition |
|---|---|
| NAARS | Northern Alberta Aquatic Rescue Society |
| NAAS | National Academy of Agricultural Sciences |
| NAASO | North American Association for the Study of Obesity |
| NABGG | National Association of Black Geologists and Geophysicists |
| NABIE | National Academy of Building Inspection Engineers |
| NABS | Natural Arch and Bridge Society |
| NABS | North American Benthological Society |
| NABS | North American Burn Society |
| NACBS | North American Conference on British Studies |
| NACE | NACE International: the Corrosion Society |
| NACS | North American Catalysis Society |
| NACSI | New Arts Cultural Society Incorporated |
| NADE | National Association for Developmental Education |
| NADS | Newick Amateur Dramatic Society |
| NADSA | Newton Abbot and District Society of Arts |
| NAEK | \mõY\¼Ð |
| NAEK | National Academy of Engineering of Korea |
| NAEP | National Association of Environmental Professionals |
| NAF | Norges Apotekerforening |
| NAF | Norwegian Association of Pharmacists |