| New College Institute | Academic & Science |
| Non-Competitive Inhibition | Academic & Science |
| North Central Institute | Academic & Science |
| New Comprehensive Institution | Academic & Science |
| Non-cash Item | Accounts and Finance |
| Necocli | Airport Code |
| News Consumer Insights | Business |
| Native Communications Incorporated | Business |
| Nationwide Communications, Inc. | Business |
| National Can Industries Ltd | Business |
| Network Communications Inc | Business |
| Navigant Consulting, Inc. | Business |
| Network Consulting, Inc. | Business |
| Network Computer Incorporated (now part of Oracle) | Business |
| Network Concepts, Inc. | Business |
| Network Controls International | Business |
| No Commercial Interest | Business |
| National Charrette Institute | Community |
| National Captioning Institute | Community |
| North Cascades Institute | Community |
| Network Communities Initiative | Community |
| Non Compliance Issue | Computing |
| Network Computer Inc. | Computing |
| Networked Critical Infrastructure | Computing |
| Neural Control Interface | Computing |
| National Compiler Infrastructure Project | Computing |
| National College of Ireland | Educational Institute |
| Neutral Cycle Indicator | Electronics |
| NFC controller interface | General |
| Non Clustered Indexed | General |
| Nelson Complexity Index | General |
| North Central Indiana | General |
| Neighborhood Competition Index | General |
| Nanocuries | General |
| Nissan Canada Inc. | General |
| Nitto Tire Canada Inc. | General |
| Non Controlling Interests | General |
| No Current Impact | General |
| Non Controlling Interest | General |
| Nissho Cloud Initiative | General |
| National Core Indicators | General |
| New Chesterton Institute | Governmental |
| National Computational Infrastructure | Governmental |
| Nonviolent Crisis Intervention | Governmental |
| Nuclear Control Institute | Governmental |
| National Cheese Institute | Governmental |
| National Comfort Institute | Governmental |
| Nearest Cross Intersection | Governmental |
| Nuclear Control Institute, Washington, DC | Governmental |
| Neisseria Cinerea | Medical |
| National Cancer Institute's | Medical |
| National Cancer Institute | Medical |
| Net Control Information | Radio Science |
| Necocli, Colombia | Regional |
| Numerical Control Interpolation | Softwares |
| Network Channel Interface | Telecommunication |
