| NTR | NTSTC | NTUC | NUAC | NUDT | NUL | NUMSA | NURC | NUT | NVA | NVCC | NVFI |
| NTRA | NTSU | NTUCB | NUBS | NUEC | NULASA | NUNS | NURP | NUUG | NVAC | NVCS | NVG |
| NTRS | NTT | NTV | NUC | NUI | NULF | NUNW | NUS | NUW | NVAE | NVD | NVIC |
| NTS | NTTC | NTVA | NUCA | NUIG | NUM | NUP | NUSAS | NUWC | NVAM | NVDA | NVIS |
| NTSA | NTTF | NTW | NUCCA | NUIM | NUMA | NUPL | NUSM | NUWSS | NVB | NVE | NVL |
| NTSB | NTU | NU | NUD | NUJ | NUMM | NUR | NUSMWI | NV | NVBA | NVF | NVLAP |
| NTSC | NTUA | NUA | NUDO | NUJS | NUMMI | NURBS | NUSSC |