| Imperial College of Tropical Agriculture | Academic & Science |
| Invest. Cap. A | Business |
| Income and Corporation Taxes Act | Business |
| Institute of Certified Tax Administrators | Business |
| Illinois Career and Technical Administrators | Business |
| International Christian Tennis Association | Community |
| Institute of Certified Travel Agents | Community |
| Information and Communication Technologies Authorityu | Computing |
| Independent Cable and Television Association | Computing |
| Information and Communications Technology Authority | Computing |
| Information and Communication Technology Authority | Computing |
| Integrated Circuits Technologies and Applications | Computing |
| Institut de Ciència i Tecnologia Ambientals | General |
| Isuzu Commercial Truck of America | General |
| Internet Checker Taxicab Archive | General |
| Intelligent Cam Torque Actuation | General |
| Integrated Circuit Topography Act | Governmental |
| International Contergan Thalidomide Alliance | Governmental |
| Industry Council for Tangible Assets | Governmental |
| Information and Communication Technologies Authority | Governmental |
| Insurance Canada Technology Awards | Insurance |
| Instituto de Ciencia y Tecnología Agrícola | International |
| International Chemical Trade Association | International |
| International Coach and Trainer Association | International |
| International Compliance Training Academy | International |
| International Conference on Tropical Agriculture | International |
| International Clinical Trials Association | International |
| International Cupping Therapy Association | International |
| InterCounty Tennis Association | Sports |
| International Center for Technology Assessment | Technology |
| International Clay Technology Association | Technology |
| Information and Communication Technology Agency | Technology |
| International Cinema Technology Association | Technology |
| Idaho Cable Telecommunications Association | Telecommunication |
