| IEEE Conference on Software Testing | Academic & Science |
| International Center for the Study of Terrorism | Academic & Science |
| Institute for Computer Music and Sound Technology | Academic & Science |
| Inter-Cultural Studies classes | Academic & Science |
| Inter-Center Strain Trial | Academic & Science |
| Institute of Catalysis Science and Technology | Academic & Science |
| Institute for Curriculum, Standards, and Technology at George Washington University | Academic & Science |
| Institute of Cryogenic & Superconductivity Technology | Academic & Science |
| Intra-company Stock Transfer | Accounts and Finance |
| Integrated Circuit Systems, Inc. | Business |
| Institute of Circulation System Technology corporation | Business |
| Immaculate Conception School of Theology | Community |
| Integrated Community Stakeholder Team | Community |
| International Communication Sciences and Technology Association | Community |
| International Christian School of Tonga | Community |
| Indiana Christian State Tournament | Community |
| Institute of Computer Science Technology | Computing |
| Institute of Clinical Science and Technology | Computing |
| Institute for Computer Science and Technology | Computing |
| Imperial College of Science and Technology | Educational Institute |
| Individual Content Skill Token | General |
| International Classification of Ships by Type | General |
| International Conference on Software Testing | International |
| International Conference on Science and Technology | International |
| International Conference on Strength Training | International |
| International Conference On Strength | International |
| International Commission of Science and Technology | International |
| I Can't Stop Thinking! | Internet |
| Integrated Clinical Specialist Technician | Jobs |
| Individual Cognitive Stimulation Therapy | Medical |
| Integrative Cancer Science and Therapeutics | Medical |
| Institute for Computer Sciences & Technology | Military and Defence |
| International Conference On Software Testing, Verification, and Validation | Softwares |
| Information, Communication, and Space Technology | Space Science |
