| Abbreviation | Definition |
|---|---|
| NANA | Northwest Arctic Native Association |
| NANB | Nurses Association of New Brunswick |
| NANDA | The North American Nursing Diagnosis Association |
| NANTA | National Association of Nigeria Travel Agencies |
| NAOBI | National Alliance of Black Interpreters, Inc. |
| NAOO | National Association of Optometrists & Opticians |
| NAP | National Association of Programmers |
| NAPA | National Acrylic Painters Association |
| NAPA | National Asphalt Pavement Association |
| NAPA | National Automobile Parts Association |
| NAPBL | National Association Of Professional Baseball Leagues |
| NAPBS | National Association of Professional Background Screeners |
| NAPC | National Association Of Personnel Consultants |
| NAPCRG | North American Primary Care Research Group |
| NAPE | The Nebraska Association Of Public Employees |
| NAPEP | National Association of Principal Educational Psychologists |
| NAPEP | National Association of Principal Educational Psychologists |
| NAPF | National Association Of Pension Funds |
| NAPFA | National Association of Personal Financial Advisors |
| NAPL | National Association for Printing Leadership |