| Abbreviation | Definition |
|---|---|
| NCA | National Conservation Area |
| NCADD | National Commission Against Drunk Driving |
| NCADD | National Council on Alcoholism and Drug Dependence |
| NCANDS | National Child Abuse and Neglect Data System |
| NCB | National Certification Body |
| NCB | National Coal Board |
| NCB | National Computing Board |
| NCB | National Cooperative Bank |
| NCBP | National Contaminant Biomonitoring Program |
| NCC | National Capital Commission |
| NCC | Non Conformity Certificates |
| NCCIC | National Cybersecurity and Communications Integration Center |
| NCCL | National Council for Civil Liberties |
| NCCS | National Center for Constitutional Studies |
| NCCT | Non-Cooperative Country or Territory |
| NCDH | National Committee Against Discrimination in Housing |
| NCEPC | National Committee on Environmental Planning and Coordination |
| NCES | National Center for Education Statistics |
| NCEZID | National Center for Emerging and Zoonotic Infectious Diseases |
| NCG | No Common Ground |