| Undeground Injection Control | Academic & Science |
| University of Illinois Chicago | Academic & Science |
| Undergraduate Investment Club | Academic & Science |
| University of Illinois at Chicago | Academic & Science |
| University of Illinois at Chicago's | Academic & Science |
| Universities in China | Academic & Science |
| United International College | Academic & Science |
| University of Indian Chinese | Academic & Science |
| United Industrial Corporation | Business |
| Ukpeaġvik Iñupiat Corporation | Business |
| Universal Instruments Corporation | Business |
| Urban Improvement Company | Business |
| United International Company Inc. | Business |
| Union Internationale De Chemins | Community |
| Union Internationale des Chemin | Community |
| Union Internationale des Chemins | Community |
| Upnp Implementers Corporation | Computing |
| User's Identification Code | Computing |
| Universal Integrated Circuit | Computing |
| User Identification Centre | Computing |
| User Identity Confidentiality | Computing |
| Universal Interface Card | Computing |
| Unified Intelligence Center | Computing |
| Underground Injection Control | Earth Science |
| Update Initiative Collective | General |
| Use Initial Conditions | General |
| Universal Item Code | General |
| Urinary iodine concentration | General |
| Universal ICAP Code | General |
| Unique Intro Contest | General |
| Ultimate In Car | General |
| Universal Ignition Control | General |
| Universal Improved Carbine | General |
| Union of Islamic Courts | Governmental |
| Unemployment Insurance Commission | Insurance |
| Umpire In Chief | Jobs |
| Unemployment Insurance of Canada | Jobs |
| Use Initial Condition | Maths |
| Unit Identification Code | Military and Defence |
| Unified Infosec Criteria | Military and Defence |
| Universal Information Client | Networking |
| Union Internationale des Chemin (International Union of Railways) | Regional |
| Universally Interoperable Core | Softwares |
| User Interface Compiler | Softwares |
| User Identification Code | Space Science |
