| NCBA | Nassau County Bar Association 
| Others |
| NCBA | National Cattlemen's Beef Association
| Others |
| NCBA | National Club Baseball Association
| Others |
| NCBA | National College of Business and Arts
| Others |
| NCBA | National Collegiate Boxing Association
| Others |
| NCBA | National Community Boats Association
| Others |
| NCBA | National Cooperative Business Association
| Others |
| NCBA | National Creditors Bar Association
| Others |
| NCBA | Neuroscience Cell Biology and Anatomy
| Others |
| NCBA | New Central Book Agency
| Others |
| NCBA | North Carolina Bankers Association
| Others |
| NCBA | North Carolina Bar Association
| Others |
| NCBA | North Carolina Biomedical Association
| Others |
| NCBA | North Carolina Bowhunters Association
| Others |
| NCBA | Northern California Band Association
| Others |
| NCBA | Northern California Baseball Association
| Others |