| Abbreviation | Definition |
|---|---|
| NCSE | National Council for Science and the Environment |
| NCSE | National Council for Self Esteem |
| NCSF | NASA College Scholarship Fund, Inc. |
| NCSF | National Cheer Safety Foundation |
| NCSFI | NASA College Scholarship Fund, Inc. |
| NCSG | National Chimney Sweep Guild |
| NCSG | North Carolina Society of Goldsmiths |
| NCSS | National Council for the Social Studies |
| NCT | National Childbirth Trust |
| NCTA | National Consortium for Teaching about Asia |
| NCTA | North Country Trail Association (7,400 km long through 7 states) |
| NCTFK | National Center for Tobacco- Free Kids |
| NCTWC | National Committee on Trafficking of Women and Children |
| NCV | National Committee on Volunteering |
| NCVS | National Center for Voice and Speech |
| NCY | National Collaboration for Youth |
| NCYL | National Center for Youth Law |
| ND | Natural Disaster |
| NDA | National Diabetes Association |
| NDA | National Dyslexic Association |