| nCi | Nanocuries 
| Others |
| NCI | National Cancer Institute
| Others |
| NCI | National Cancer Institute's
| Others |
| NCI | National Captioning Institute
| Others |
| NCI | National Charrette Institute
| Others |
| NCI | National Cheese Institute
| Others |
| NCI | National College of Ireland
| Others |
| NCI | National Comfort Institute
| Others |
| NCI | National Compiler Infrastructure Project
| Others |
| NCI | National Computational Infrastructure
| Others |
| NCI | National Core Indicators
| Others |
| NCI | Nationwide Communications Inc
| Others |
| NCI | Nationwide Communications, Inc.
| Others |
| NCI | Native Communications Incorporated
| Others |
| NCI | Navigant Consulting Inc
| Others |
| NCI | Nearest Cross Intersection
| Others |
| NCI | Necocli, Colombia
| Others |
| NCI | Neighborhood Competition Index
| Others |
| NCI | Neisseria Cinerea
| Others |
| NCI | Nelson Complexity Index
| Others |
| NCI | Net Control Information
| Others |
| NCI | Network Channel Interface
| Others |
| NCI | Network Communications Inc
| Others |
| NCI | Network Communities Initiative
| Others |
| NCI | Network Computer Inc.
| Others |
| NCI | Network Computer Incorporated (now part of Oracle)
| Others |
| NCI | Network Concepts, Inc.
| Others |
| NCI | Network Consulting Inc
| Others |
| NCI | Network Consulting, Inc.
| Others |
| NCI | Network Controls International
| Others |
| NCI | Networked Critical Infrastructure
| Others |
| NCI | Neural Control Interface
| Others |
| NCI | Neutral Cycle Indicator
| Others |
| NCI | New Chesterton Institute
| Others |
| NCI | New College Institute
| Others |
| NCI | New Comprehensive Institution
| Others |
| NCI | News Consumer Insights
| Others |
| NCI | NFC controller interface
| Others |
| NCI | Nissan Canada Inc.
| Others |
| NCI | Nissho Cloud Initiative
| Others |
| NCI | Nitto Tire Canada Inc.
| Others |
| NCI | No Commercial Interest
| Others |
| NCI | No Current Impact
| Others |
| NCI | Non Clustered Indexed
| Others |
| NCI | Non Competitive Inhibition
| Others |
| NCI | Non Compliance Issue
| Others |
| NCI | Non Controlling Interest
| Others |
| NCI | Non Controlling Interests
| Others |
| NCI | Non-Cash Item
| Others |
| NCI | Non-Competitive Inhibition
| Others |
| NCI | Nonviolent Crisis Intervention
| Others |
| NCI | North Cascades Institute
| Others |
| NCI | North Central Indiana
| Others |
| NCI | North Central Institute
| Others |
| NCI | Nuclear Control Institute
| Others |
| NCI | Numerical Control Interpolation
| Others |