| Abbreviations | Meaning |
 | NASOG | National Association Of Specialist Obstetricians & Gynaecologists |
 | NASP | National Association Of School Psychologists |
 | NASPE | North American Society Of Pacing And Electrophysiology |
 | NASPEM | North American Society For Pediatric Exercise Medicine |
 | NASPGHAN | North American Society For Pediatric Gastroenterology Hepatology, And Nutrition |
 | NASPHV | National Association Of State Public Health Veterinarians |
 | NASPSPA | North American Society For The Psychology Of Sport And Physical Activity |
 | NASS | North American Spine Society |
 | NASTAD | National Alliance Of State & Territorial AIDS Directors |
 | NASW | National Association Of Social Workers |
 | NAT | National AIDS Trust |
 | NATA | Network For Advancement Of Transfusion Alternatives |
 | NATCO | Organization For Transplant Professionals |
 | NATHNAC | National Travel Health Network And Centre |
 | NATIONS | National Tobacco Information Online System |
 | NATN | National Association Of Theatre Nurses |
 | NAVBC | National Agricultural And Veterinary Biotechnology Centre (Ireland) |
 | NAVC | North American Veterinary Conference |
 | NAVCA | North American Veterinary College Administrators |
 | NAVH | National Association For Visually Handicapped |
 | NAVLE | North American Veterinary Licensing Examination |
 | NAVS | National Anti-Vivisection Society |
 | NAVS | North American Vegetarian Society |
 | NAVTA | National Association Of Veterinary Technicians In America |
 | NAWHO | National Asian Women's Health Organization |
 | NBAC | National Bioethics Advisory Commission |
 | NBAO | New Brunswick Association Of Optometrists. Association Des Optométristes Du Nouveau-Brunswick |
 | NBART | New Brunswick Association Of Respiratory Therapists |
 | NBBCN | New Brunswick Breast Cancer Network |
 | NBBG | Nebraska Behavioral Biology Group |
 | NBC | National Board For Cerfication In Dental Laboratory Technology |
 | NBCC | National Board For Certified Counselors |
 | NBCC | National Breast Cancer Coalition |
 | NBCCEDP | National Breast And Cervical Cancer Early Detection Program |
 | NBCCF | National Breast Cancer Coalition Fund |
 | NBCDI | National Black Child Development Institute |
 | NBCH | National Business Coalition On Health |
 | NBCHPN | National Board For Certification Of Hospice & Palliative Nurses |
 | NBCOT | National Board For Certification In Occupational Therapy |
 | NBDAA / AADNB | New Brunswick Dental Assistants Association / Association Des Assistants Et Assistantes Dentaires Du Nouveau-Brunswick |
 | NBDE | National Board Dental Examination |
 | NBDHE | National Board Dental Hygiene Examination |
 | NBDHMT | National Board Of Diving And Hyperbaric Medical Technology |
 | NBDS | New Brunswick Dental Society. Société Dentaire Du Nouveau-Brunswick |
 | NBHC | National Bone Health Campaign |
 | NBHE | National Board Of Homeopathic Examiners |
 | NBIF | National Biotechnology Information Facility |
 | NBII | National Biological Information Infrastructure |
 | NBLIC | National Black Leadership Initiative On Cancer |
 | NBME | National Board Of Medical Examiners |