| AAI | American Alpine Institute (skr.) |
|---|---|
| ADI | American Documentation Institute (skr.) |
| AHI | Animal Health Institute (skr.) |
| AIH | American Institute of Homeopathy (skr.) |
| API | American Petroleum Institute (skr.) |
| CUI | Canadian Urban Institute (skr.) |
| EIAR | Ethiopian Institute of Agricultural Research (skr.) |
| IET | Institute of Environmental Technology (skr.) |
| IIL | Institute of International Law (skr.) |
| IIP | International Institute of Philosophy (skr.) |