sort by Rank | Alpha
| Possible Meanings | Rank |
| Network for the Information Society | **** |
| National Technical Information Services | **** |
| National Teratology Information Service | **** |
| National Training Information System | *** |
| NT Institute of Sport | *** |
| Northern Territory Institute of Sport | *** |
| National Trust Insurance Services | *** |
| National Technology Information Service | *** |
| National Technical Information System | *** |
| National Technical and Information Service | *** |
| Non-tropical idiopathic splenomegaly | ** |
| non-tuberculous infectious spondylodiscitis | ** |
| nuclear transport inhibition signal | ** |
| nuclear transport inhibitory signals | ** |
| New Turkey Inspection System | ** |
| National Technical Information Serivce | ** |
| National Technology Information Services | ** |
| National Techical Information Service | * |
| National Technical Information Server | * |
| National Technical Information Systems | * |
| Navigation Thermal Imaging System | * |
| National Technical Information Serice | * |
| NATO Technical Interoperability Standards | * |
| National Technical Information Servcie | * |
| National Technical Information Service a unit of the | * |
| National Technical Information Servie | * |
| National Technical Inforrnation Service | * |
| National Topographic Information Service | * |