| Irrigation Technology Center | Academic & Science |
| Instructional Technology Center | Academic & Science |
| Information Technology Club | Academic & Science |
| Istituto Trentino di Cultura | Academic & Science |
| International Teledemocracy Centre | Academic & Science |
| International Theological Commission | Associations & Organizations |
| International Trade Commission | Business |
| Information Technology Center | Business |
| International Technical Ceramics | Business |
| Ideal Toy Corporation | Business |
| International Training Centre | Business |
| Industrial Tank Corporation | Business |
| International Transmission Company | Business |
| International Travel Connections | Business |
| Imagination Technology Corporation | Business |
| Information Technology Charlotte | Business |
| Information Technology Council | Business |
| Indian Tobacco Corporation | Business |
| Investment Tax Credit | Business |
| Indian Trade Classification | Business |
| International Technical Certificate | Business |
| Intercontinental Terminals Company | Business |
| Insurance Technologies Corporation | Business |
| Industrial Training Council | Business |
| Indian Tobacco Company | Business |
| International Technidyne Corporation | Business |
| Incorporated Television Company | Business |
| Industry Technical Committee | Business |
| Iranian Tobacco Company | Business |
| Industrial Tooling Corporation | Business |
| International Tonnage Certificate | Business |
| International Trade Centre | Business Organization |
| International Typeface Corporation | Business Organization |
| Independent Television Commission | Community |
| Institute of Texan Cultures | Community |
| International Training for Chinese | Community |
| Instructional Technologies Center | Community |
| International Trauma Care | Community |
| Interdenominational Theological Center | Community |
| International Training in Communication | Community |
| International Telemetering Conference | Community |
| Inland Transport Committee | Community |
| Imperial Tobacco Company | Company Name |
| Instrumentation Tray Cable | Computer Hardware |
| Information Trust Corporation | Computing |
| Information Technical Centre | Computing |
| Innovative Technology Center | Computing |
| Interval Timer Counter | Computing |
| Intel Trace Collector | Computing |
| Independent Transport Clock | Computing |
| Intelligent Tape Controller | Computing |
| Interactive Test Capture | Computing |
| I-Tunes Connect | Computing |
| Institute of Technology of Cambodia | Computing |
| Institute of Technology at Central | Computing |
| Interface Termination Unit | Computing |
| Input Tax Credit | Country Specific |
| IoT Chain | Cryptocurrency |
| Integrated Terrain Compensation | Earth Science |
| Industrial Technician Certificate | Educational Degree |
| Information Technology and Communication | Educational Degree |
| Integration Time Control | General |
| Intergalactic Trade Council | General |
| Instrumental TransCommunication | General |
| Intelligent Trace Control | General |
| Interstate Truck Center | General |
| Isuzu Truck Centre | General |
| Indian Touring Car | General |
| Integrated Touchscreen Control | General |
| International Teletraffic Congress | General |
| Integrity Trust and Commitment | General |
| International Trade Center | General |
| International Training Center | General |
| Intelligent Touch Controller | General |
| Instrumental Trans Communications | General |
| In The Cut | General |
| Independent Tournament Circuit | General |
| International Test Commission | General |
| Interactive Todd Coxeter | General |
| Industrial Training centre | General |
| Integrity Trust Commitment | General |
| Infared Training Center | General |
| Infrared Training Center | General |
| Inter Tribal Consortium | General |
| Innovative Turnaround Controls | General |
| International Tobacco Control | General |
| Intermodal Transit Center | General |
| Israel Trauma Coalition | General |
| Integral Tai Chi | General |
| International Truck and Engine Corporation | General |
| International Touringcar Championship | General |
| Intelligent Traction Control | General |
| Ignition Timing Controller | General |
| Infotainment Technic Center | General |
| Injection Timing Control | General |
| Interieur Tout Cuir | General |
| Intermediate Time Control | General |
| International Thunderbird Club | General |
| Intake Air Temperature Compensator | General |
| Ibiza Tuning Club | General |
| Integrated Temperature Control | General |
| Indiana Triumph Cars | General |
| International Truck Club | General |
| Isuzu Training Center | General |
| Information Technology Committee | Governmental |
| In The Canal | Governmental |
| Ignition Timing Control | Governmental |
| International Tonnage Convention | Governmental |
| Information Technology Commission | Governmental |
| International Terrorist Coalition | Governmental |
| Independent Theatre Council | Governmental |
| Innovation and Technology Commission | Governmental |
| Information Technician Chief Petty Officer | Governmental |
| Institute for Theory and Computation | Governmental |
| Iowa Trauma Coordinators | Healthcare |
| International Transistor Corporation | International |
| Intercontinental | International |
| Internet Test Cricket | Internet |
| In The Context | Internet |
| In This Case | Internet |
| Information Theoretic Criterion | Maths |
| Instructions To Consultants | Messaging |
| Intensive Training Centre | Military and Defence |
| ITC Limited | NSE Company Symbol |
| Norfolk Southern Railway Company (formerly Illinois Terminal Railroad) | Regional |
| Illinois Terminal Railroad (Norfolk Southern) | Regional |
| Igloo Thermal Control | Space Science |
| International Tennis Centre | Sports |
| Investment Trust Company | Stock Exchange |
| Industrial Technology Centre | Technology |
| Instructional Technology Consortium | Technology |
| Instructional Technology Council | Technology |
| Intellicad Technology Consortium | Technology |
| Interstate Telecommunications Cooperative | Telecommunication |
