| NCTA | National Cable Telecommunications Association 
| Others |
| NCTA | National Cable Television Association
| Others |
| NCTA | National Capital Transportation Agency
| Others |
| NCTA | National Christmas Tree Association
| Others |
| NCTA | National Cloud Technologists Association
| Others |
| NCTA | National College Testing Association
| Others |
| NCTA | National Collegiate Taekwondo Association
| Others |
| NCTA | National Collegiate Training Academy
| Others |
| NCTA | National Consortium for Teaching about Asia
| Others |
| NCTA | National Council for Technological Awards
| Others |
| NCTA | National Council for the Traditional Arts
| Others |
| NCTA | Nebraska College of Technical Agriculture
| Others |
| NCTA | Newborn Care Training Academy
| Others |
| NCTA | Non Contractual Technical Activities
| Others |
| NCTA | Norfolk County Teachers Association
| Others |
| NCTA | North Carolina Trucking Association
| Others |
| NCTA | North Carolina Turnpike Authority
| Others |
| NCTA | North Central Texas Academy
| Others |
| NCTA | North Coast Triumph Association
| Others |
| NCTA | North Country Trail Association
| Others |
| NCTA | North Country Trail Association (7,400 km long through 7 states)
| Others |
| NCTA | Northern California Translators Association
| Others |