| Abbreviation | Definition |
|---|---|
| IJSC | Institute Joint Staff Council |
| IJSD | Institute for Justice Sector Development |
| IKAT | Institute for Knowledge and Agent Technology |
| IKL | Institute of Knowledge and Leadership |
| IKR | Institute of Kiswahili Research |
| IKT | Institute of Knowledge Transfer |
| IKTBN | Institut Kemahiran Tinggi Belia Negara (Malay: National Advanced Youth Vocational Institute; Sepang, Selangor, Malaysia) |
| ILA | Institute for Leadership in the Americas |
| ILA | Institute for Legislative Action |
| ILA | Institute for Liberal Arts |
| ILA | Institute of the Liberal Arts |
| ILAC | Institute for Latin American Concern |
| ILAM | Institute of Landscape Architects Malaysia |
| ILAS | Institute for Lifecourse and Society |
| ILAS | Institute of Latin American Studies |
| ILB | Institute for Leadership Business |
| ILBS | Institute of Liver and Biliary Sciences |
| ILCB | Institute of Language Communication and the Brain |
| ILCC | Institute for Language Cognition and |
| ILCC | Institute for Language Cognition and Computation |