| Acronym | Definition |
|---|
| NCI | National Cancer Institute (US) |
| NCI | NASA (National Aeronautics and Space Administration) Critical Information |
| NCI | NFC (Near Field Communication) Controller Interface |
| NCI | Navigant Consulting, Inc. (consulting firm) |
| NCI | Nevada Cancer Institute (Las Vegas, NV) |
| NCI | Non Compliance Issue |
| NCI | Network Computer Inc. |
| NCI | Nuclear Control Institute |
| NCI | National Cheese Institute (International Dairy Foods Association) |
| NCI | Network Channel Interface |
| NCI | National Captioning Institute |
| NCI | Newcomb College Institute (Tulane University; New Orleans, LA) |
| NCI | National Corn Index |
| NCI | Nuclear Cities Initiative |
| NCI | National Coastwatch Institution (UK registered charity) |
| NCI | Non-Controlling Interest (finance) |
| NCI | Nippon Carbide Industries (various locations) |
| NCI | Nanocuries |
| NCI | Non Coded Information |
| NCI | National Coaching Institute (Canada) |
| NCI | National Center for Interpretation |
| NCI | National Client Identifier (finance) |
| NCI | National Church Institutions |
| NCI | New Community Instrument (EU) |
| NCI | National Cybersecurity Initiative (various nations) |
| NCI | National Computer Institute |
| NCI | New Century Inns (UK) |
| NCI | Nomura Capital Investment (est. 1999; Japan) |
| NCI | Non Compute Intensive (computer applications) |
| NCI | National Corridors Initiative, Inc. |
| NCI | Nelson Complexity Index (oil industry) |
| NCI | Netcorps Canada International |
| NCI | National Coney Island (Michigan) |
| NCI | Non-Cooperative Identification |
| NCI | Nationalities Council of Indiana, Inc. |
| NCI | Network Communication Interface (military technology) |
| NCI | Northeast Computer Institute |
| NCI | NetWare Centers International |
| NCI | National Computer Index (UK) |
| NCI | NHS (National Health Service) Centre for Involvement (UK) |
| NCI | Nearest Collision Intercept |
| NCI | Naval Coast Inspector (US Navy) |
| NCI | Narcotics/Covert Investigations Unit |
| NCI | Naval Combat Identification |
| NCI | Network Circuit Interface |
| NCI | Navy Compartmented Information |
| NCI | Non-Credible Inconsequential |
| NCI | New Concepts Initiative |
| NCI | Non Conforming Image |
| NCI | New Citizens Corporation (gaming web portal) |