| Acronym | Definition |
|---|
| ICI | Investment Company Institute |
| ICI | Institute on Community Integration (University of Minnesota) |
| ICI | Institute for Community Inclusion (University of Massachusetts, Boston) |
| ICI | Imposta Comunale sugli Immobili (Italian tax on buildings) |
| ICI | International Crankshaft, Inc. (Georgetown, KY) |
| ICI | International Climate Initiative |
| ICI | Istanbul Cooperation Initiative (NATO) |
| ICI | Investment Casting Institute |
| ICI | Industrial, Commercial, and Institutional |
| ICI | Imperial Chemical Industries PLC |
| ICI | Image Component Information |
| ICI | Intracervical Insemination |
| ICI | Immune Checkpoint Inhibitor |
| ICI | Infrared Cameras, Inc. (Beaumont TX) |
| ICI | India China Institute (New School; New York) |
| ICI | Institutional/Commercial/Industrial (zoning) |
| ICI | International Consulting, Inc. (various locations) |
| ICI | Inter Carrier Interference |
| ICI | Istanbul Chamber of Industry (est. 1952; Istanbul, Turkey) |
| ICI | Invertebrate Community Index |
| ICI | International Communications, Inc. (various locations) |
| ICI | Inter-Carrier Interface (ATM) |
| ICI | Inter-Channel Interference |
| ICI | I'll Cry Instead (Beatles song) |
| ICI | International Compact for Iraq (UN) |
| ICI | Information Communication Infrastructure |
| ICI | International Commerce Institute (Brussels, Belgium) |
| ICI | Institut Canadien des Ingénieurs (French) |
| ICI | Intracortical Inhibition |
| ICI | Islamic Cultural Institute (various locations) |
| ICI | Infrared Cloud Imager |
| ICI | Interface Control Information |
| ICI | International Correspondence Institute |
| ICI | Institute for Civic Involvement (Florida) |
| ICI | Innovative Concepts, Inc |
| ICI | Institute of Criminal Investigation |
| ICI | International Computerware, Inc. (Marlborough, MA) |
| ICI | International Conference in Central Asia on Internet |
| ICI | Information Conservation, Inc. (bookbinding; North Carolina) |
| ICI | In-Core Instrumentation |
| ICI | Islamic Center of Irving (Texas) |
| ICI | Investment Corporation of India |
| ICI | International Charter Incorporated of Oregon |
| ICI | Industrial Chemicals Inc. |
| ICI | International Cosmetic Ingredient |
| ICI | Industrial Computing Initiative (LLNL, LANL, Cray, et al) |
| ICI | Iligan Computer Institute (Iligan City, Philippines) |
| ICI | Incoming Call Identification |
| ICI | Institute of Chemistry of Ireland |
| ICI | Ice Cold Ice |
| ICI | InterCultural Iceland (Reykjavik, Iceland) |
| ICI | Independent Certified Instructor (Baby Signs, Inc.; Vacaville, CA) |
| ICI | Institut Colonial International (French: International Colonial Institute) |
| ICI | International Communicology Institute (human science) |
| ICI | Initial Command Inspection |
| ICI | Inter-Exchange Carrier Interface (Bellcore) |
| ICI | Intercycle Interval |
| ICI | Ideas and Concepts, Inc. |
| ICI | Interactive Communications Interface |
| ICI | Internal Class Implementation |
| ICI | Instituto Ciência da Informação |
| ICI | Industrial Commission of Illinois |
| ICI | Indiana Chess Institute |
| ICI | Instituto de Computación Integral (Guatemalan school) |
| ICI | Incense Cedar Institute |
| ICI | Integration Communications International, Inc. |
| ICI | iCatchIT (Business Process Outsourcing) |
| ICI | Internal Controls Investigation |
| ICI | Initial Capabilities Inspection |
| ICI | International Code Identifier |
| ICI | Intelligent Communication Interface |
| ICI | Industrial Composites, Inc. (various locations) |
| ICI | Islamic Counterterrorism Institute |