| Abbreviation | Definition |
|---|---|
| NCSAA | North Carolina Ski Areas Association |
| NCSL | National Conference of State Legislators |
| NCSPA | National Corrugated Steel Pipe Association |
| NCTE | National Council of Teachers of English |
| NCTL | National College for Teaching and Leadership |
| NCTRC | National Council for Therapeutic Recreation Certification |
| NCWM | National Conference on Weights and Measures |
| NDBA | North Dakota Bankers Association |
| NDBA | North Dalls Bar Association |
| NDBA | North Davidson Business Association |
| NDBA | North Dearborn Business Association |
| NDEA | National Defence Employees Association |
| NDEA | National Directory of Expert Advisers |
| NDEA | North Dakota Education Association |
| NDEA | North Dallas Eye Association |
| NDIA | National Defender Investigator Association |
| NDIA | National Defense Industrial Association |
| NDMA | National Debt Mediation Association |
| NDMA | North Devon Manufacturers Association |
| NDNA | National Day Nurseries Association |