| National Tenant Network, Inc. | Business |
| Normal Temperature and Pressure | Chemistry |
| National Transformation Program | Community |
| National Theater Project | Community |
| National Technological Park | Community |
| Neo Tech Publishing | Community |
| Network Termination Point | Computer and Networking |
| Numerous Time Programmable | Computer Hardware |
| Netserver Technology Professional | Computing |
| No Time Posted | Computing |
| No Token Pass | Computing |
| Non Trouble Procedures | Computing |
| National Title Professional | General |
| National Time Protocol | General |
| National Trade Productions | General |
| Neuroscience Training Program | General |
| National Training Programme | General |
| Next Technological Platform | General |
| National Truck Protection | General |
| Normal Temp and Pressure | General |
| Need To Poop | General |
| New Tip Placement | General |
| Number Of Theoretical Plates | General |
| Not Too Probative | General |
| Network Tme Protocol | General |
| Network Transfer Protocol | General |
| Normal Temperature Pressure | General |
| Net Transport Proper | General |
| National Time Protocal | General |
| N Terminal Peptide | General |
| Need To Pee | General |
| Narcotic Treatment Programs | General |
| National Transport Policy | General |
| No Truck Parking | General |
| National Toxicology Program | Governmental |
| National Transformation Party | Governmental |
| National Transportation Policy | Governmental |
| Department of Energy National Transportation Program | Governmental |
| Network Time Protocol | Information Technology |
| National Transition Network | Jobs |
| Normal Temperature and Pulse | Medical |
| Nutritional Therapy Practitioner | Medical |
| Nutritional Therapy Practicioner | Medical |
| New Training Program | Military and Defence |
| Naval Telecommunications Publication | Military and Defence |
| Next Time Packet | Networking |
| Neighbor Test Packet | Networking |
| Notetab Pro | Softwares |
| Network Test Panel | Space Science |
| Notice To Proceed | Space Science |
| Network Technology Partners | Technology |
| Northern Telecom Products | Telecommunication |
