| Abbreviation | Definition |
|---|---|
| NCCN | National Comprehensive Cancer Network |
| NCCR | National Council of Chain Restaurants |
| NCCS | National Council for the Social Studies |
| NCDA | Nebraska Choral Directors Association |
| NCDA | New Car Dealers Association |
| NCDHA | North Carolina Dental Hygienists Association |
| NCEA | National Catholic Education Association |
| NCEES | National Council of Examiners for Engineering and Surveying |
| NCERT | National Council of Education, Reasearch, and Training |
| NCHA | Northern California Handball Association |
| NCHA | Nottingham Community Housing Association |
| NCIA | National Correctional Industries Association |
| NCIC | National Construction Industry Council |
| NCM | Nightlife Coverage Magazine |
| NCMA | National Concrete Masonry Association |
| NCNN | National Comprehensive Cancer Network |
| NCOIL | National Conference of Insurance Legislators |
| NCPCA | North Carolina Pest Control Association |
| NCPI | National Clay Pipe Institute |
| NCQA | Northern California Quidditch Association |