| AI | Aquinas Institute |
|---|---|
| CORI | Canadian Outcomes Research Institute |
| CUI | Canadian Urban Institute (skr.) |
| DIME | Dynamics of Institutions and Markets in Europe |
| IDL | 1. Inštitút medzinárodného práva (Institute of International Law) 2. international date line |
| IIA | Institute of Internal Auditors |
| IIL | Institute of International Law (skr.) |
| IIP | Institut International de Presse (skr.) |
| IIP | International Institute of Philosophy (skr.) |
| IPI | International Press Institute (skr.) |