| North American Truffling Society | Academic & Science |
| North America Telugu Society | Academic & Science |
| Olympic Cascade Financial Corporation | Business |
| National Association of Teachers of Singing | Business |
| Nebraska Association of Teachers of Science | Business |
| Neighborhood Action Team Seattle | Community |
| Nihon Automotive Technical School | Community |
| North Avenue Trade School | Community |
| National Aerospace Technology Strategy | Computing |
| National Adult Tobacco Survey | General |
| North American Technical Services | General |
| Nat Nat | General |
| Not Afraid To Sweat | General |
| National Apprenticeship Training Scheme | General |
| Neural Autonomic Transport System | General |
| Nissan Anti Theft System | General |
| North Atlantic Track System | General |
| National Air Traffic Services po | General |
| Nihon Automobile High Technical School | General |
| North American Truck Show | General |
| North American Trucking Survey | General |
| North American Transportation Statistics | General |
| National Air Traffic Services | Governmental |
| National Automated Travel System | Governmental |
| Naval Air Transport Service | Governmental |
| North Arkansas Transportation Service | Governmental |
| North Arkansas Transportation Se | Governmental |
| New Aircraft Tool System | Military and Defence |
| Next-generation Administration and Tracking System | Softwares |
| National Aquatic Training Society | Sports |
| Washington Nationals (baseball Team) | Sports |
| National Athletic Testing System | Sports |
| North American Trials Series | Sports |
