sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Non Teacher Retirement System | *** |
| Network Therapy Rating Scale | ** |
| Non Teachers Retirement System | ** |
| Nebraska Telecommunications Relay System | ** |
| National Technical Reports Server | * |
| NASA Technical Report Service | * |
| Navy Technical Regulatory System | * |
| Navy Training Reservation System | * |
| Northern Territory Rehabilitation Service | * |