| Nazarene Theological Seminary | Academic & Science |
| New Testament Studies | Academic & Science |
| National Topographic System | Academic & Science |
| Nano Tubes | Academic & Science |
| Need To Sell | Business |
| New Trading System | Business |
| North Trade School | Community |
| National Theatre School of Canada | Community |
| National Training School | Community |
| Navigational Technology Satellites | Computing |
| NetWare Telephony Services | Computing |
| Nt Server | Computing |
| Network Source | Computing |
| Novell Technical Support | Computing |
| New Typesetting System | Computing |
| Nt System | Computing |
| Network Technical Support | Computing |
| Novell Technical Services | Computing |
| Network Tracking System | Computing |
| Network Time Security | Computing |
| Network Telephony Services | Computing |
| Note To Self | Computing |
| Netsend Executable Ascii Text File | File Type |
| Norton Tutorial | File Type |
| Narodno Trudovoi Soyuz | General |
| Network Test System | General |
| Notices to Schedule | General |
| National Trails System | General |
| Neal T Saiki | General |
| Northeast Technical Services | General |
| Nucleus Tractus Solitarii | General |
| Tire Supply | General |
| Number Translation Services | General |
| Non Terminal Separation | General |
| Non Traffic Sensitive | General |
| Necessary To Succeed | General |
| Nascar Truck Series | General |
| Nascar Toyota Series | General |
| Nascar Touring Series | General |
| National Touring Series | General |
| New Traffic Signals | General |
| National Transportation System | General |
| New Truck Seat | General |
| Nebraska Technical Services | General |
| Network Telephone Services | General |
| Nutritional Technical Support | General |
| Notice To Schedule | General |
| Natsionalno Trudovoi Soyuz | General |
| Next To Skin | General |
| Northbound Treatment Services | General |
| Number Table Sorting | General |
| Non Thread Safe | General |
| National Technical Systems | General |
| NEO Tracking System | General |
| Never The Same | General |
| Nebraska Technical Service | General |
| Not Thread Safe | General |
| National Testing Service | Governmental |
| Nevada Test Site | Governmental |
| Neighborhood Transportation Service | Governmental |
| National Transportation Statistics | Governmental |
| NATTRASANKOTTAI | Indian Railway Station |
| Nothing To Say | Internet |
| No Talent Schmoes | Jobs |
| Nucleus Tractus Solitarius | Medical |
| Neuro-Typical Specimen | Medical |
| Natural Therapeutics Specialist | Medical |
| Not The Same | Messaging |
| Not Too Serious | Messaging |
| Night Targeting System | Military and Defence |
| Noncombatant Evacuation Operation Tracking System | Military and Defence |
| Naval Telecommunications System | Military and Defence |
| Network Time Server | Networking |
| Network Time Synchronization | Networking |
| Windows New Technology Server | Networking |
| Network Testing Services | Networking |
| National Traffic System | Radio Science |
| Near Term Schedule | Space Science |
| Not To Scale | Space Science |
| No Team Sheet | Sports |
| Neidhardt Training Stables | Sports |
| Network Technology Systems | Technology |
| Networking and Telecommunications Services | Telecommunication |
| Number Translation Service | Telecommunication |
