| Abbreviation | Definition |
|---|---|
| ITCC | International Trade Club of Chicago |
| ITEC | Information Technology English Club |
| ITFC | Ipswich Town Football Club |
| ITOC | Isuzu Trooper Owners Club |
| ITTC | Internationale Trekker Trek Club |
| IUCM | International University Club Munich |
| IUCS | International Universal Communication Symposium |
| IVC | Inter Varsity Club |
| IVC | International Vacation Club |
| IWC | Izaak Walton Club |
| IWCD | International Women's Club of Dublin |
| IWCH | International Women's Club of Helsinki |
| IWREC | Irrigation and Water Resources Engineering Club |
| IYC | IMPACT Youth Club |
| IYC | International Youth Club |
| IYC | Inverness Yacht Club |
| IYC | Island Yacht Club |
| IYKYK | Infinite Young Kangaroos Yelp Keenly |
| JACO | Japanese Animation Club of Orlando |
| JACT | Japanese Animation Club of Tallahassee |