| Abbreviation | Definition |
|---|---|
| IBEA | International Business Education Alliance |
| IBSA | International Business Solutions Alliance |
| IBTA | International Brain Tumour Alliance |
| ICA | International Cooperative Alliance |
| ICAAP | International Cooperative Alliance Asia Pacific |
| ICABS | Ifla Cdnl Alliance For Bibliographic Standards |
| ICAP | International Christian Alliance on Prostitution |
| ICAT | Indiana Citizens Alliance for Transit |
| ICAT | Indiana Citizens Alliance for Transit Indiana Citizens |
| ICEA | Ionia County Economic Alliance |
| ICSA | International Child Search Alliance |
| ICTA | International Contergan Thalidomide Alliance |
| IDAPI | Inmate Dog Alliance Project of Idaho |
| IDIA | International Development Innovation Alliance |
| IDOA | International Donor Offspring Alliance |
| IDRA | International Drowning Research Alliance |
| IDRA | International Drowning Researcher Alliance |
| IDSA | Interior Design Student Alliance |
| IEBA | Inland Empire Biking Alliance |
| IEDA | Interdisciplinary Earth Data Alliance |