| International Chemical Safety Cards | Academic & Science |
| International Climate Science Coalition | Academic & Science |
| Islamia College of Science and Commerce, | Academic & Science |
| International Council of Shopping Centers | Business |
| Integrated Computer Solutions Consultants | Business |
| Intel China Software Center | Business |
| International Chemical Safety Card | Chemistry |
| Islamic Center of Southern California | Community |
| International Cycling Safety Conference | Community |
| International Conference on Spatial Cognition | Community |
| International Conference on Semantic Computing | Computing |
| International Conference on Sensors and Control | Computing |
| International Conference on Services Computing | Computing |
| Interstellar Capital Systems Consortium | General |
| International Center for Studies in Creativity | General |
| International Collegiate Sales Competition | General |
| International Coalition of Shopping Centers | General |
| Inter Chip Serial Communications | General |
| International Cargo Security Council | Governmental |
| International Civil Service Commission | Governmental |
| International Catholic Stewardship Council | Governmental |
| International Council of Shopping Centres | Governmental |
| International Center Student Council | Governmental |
| International Congress of Scleral Contacts | International |
| International Catholic Stewardship | International |
| International Commission for Salary Cuts | International |
| International Certification Standards Committee | International |
| International Cataloguing Standards Committee | International |
| Institute For Climate and Sustainable Cities | Regional |
| Interconnect Software Consortium | Softwares |
