| Imperial Chemical Industries ( ICI, England) | Academic & Science |
| International Correspondence Institute | Academic & Science |
| Inner City Internship | Academic & Science |
| Institiúid Ceimice na hÉireann | Academic & Science |
| Institute of Chemistry of Ireland | Academic & Science |
| Invertebrate Community Index | Academic & Science |
| Iodine monochloride | Academic & Science |
| Cicia | Airport Code |
| Income Continuation Insurance | Business |
| Interior Contractors Inc | Business |
| Industrial Contractors Inc | Business |
| Commercial Investments | Business |
| Indiana Constructors Inc | Business |
| Industrial Commercial and Investment | Business |
| Investment Company Institute | Business |
| Imperial Chemical Industries | Business |
| The Internet Connection, Incorporated | Business |
| Interweave Continental, Inc. | Business |
| Independent Colleges of Indiana | Business |
| Independent Curators International | Business |
| Inter-Citic Minerals, Inc. | Business |
| Innovative Creations Inc | Business |
| International Certificate of Identity | Business |
| International Contractors Incorporated | Business |
| Institute for Cultural Inquiry | Community |
| Institute for Community Inclusion | Community |
| IFIP International Conference in Central Asia on Internet | Community |
| Interactive Communication Initiative | Community |
| Institute on Community Integration | Community |
| International Composers and Improvisors | Community |
| Islamic Center of Irving | Community |
| International Cocoa Initiative | Community |
| Industrial Conservation Initiative | Community |
| Inter Carrier Interference | Computer and Networking |
| Image Component Information | Computing |
| Institutul de Cercetare-Dezvoltare in Informatica | Computing |
| Incoming Call Identification | Computing |
| Inter-Exchange Carrier Interface | Computing |
| Interface Control Information | Computing |
| Iligan Computer Institute | Computing |
| I’m Crying Inside | Computing |
| Indian Concrete Institute | Country Specific |
| Ice Core Index | General |
| Integrated Calibration Index | General |
| Independent Commercial Importers | General |
| Intelligent Car Initiative | General |
| Intersection Conflict Index | General |
| Inflators Cheyyar India | General |
| In Car Infotainment | General |
| Inverted Colored Image | General |
| Istanbul Cooperation Initiative | General |
| Industrial Commercial Institutional | General |
| Inspire Creativity Initiative | General |
| Integrated Cellular Imaging | General |
| Integrated Communication Interface | General |
| Inner City Impact | General |
| Indoor Cycle Instructor | General |
| Inter Carrier Interface | General |
| Institute on Communication and Inclusion | Governmental |
| Industrial, Commercial, and Institutional | Governmental |
| Integrated Change Initiative | Governmental |
| Intercultural Communication Institute | Governmental |
| Issues in Critical Investigation | Governmental |
| International Cooperation Initiative | Governmental |
| Investment Casting Institute | Governmental |
| Insurance Center Inc | Insurance |
| Instituto de Cooperación Iberoamericana | International |
| International Contractors Inc | International |
| International Crankshaft Inc | International |
| Internet Computer Integration | Networking |
| Investment Companies Index | Stock Exchange |
