| Abbreviation | Definition |
|---|---|
| IISD | Institute for Inspiration Self Development |
| IISD | International Institute for Sustained Dialogue |
| IISE | Institute for Innovation in Sustainable Engineering |
| IISE | Institute for International Studies in Education |
| IISE | Institute of Industrial and Systems Engineers |
| IISE | International Institute for Social Entrepreneurs |
| IISE | International Institute for Special Education |
| IISE | International Institute for Species Exploration |
| IISER | Indian Institutes of Science Education and Research |
| IISF | Islamic Institute for Spiritual Formation |
| IISH | Indian Institute of Scientific Heritage |
| IISH | Institute for Implementation Science and Health |
| IISH | Institute for Integrative Science Health |
| IISL | International Institute for the Sociology of Law |
| IISL | International Institute of Space Law |
| IISM | Indian Institute of Skiing and Mountaineering |
| IISM | Institute of Information Systems and Management |
| IISM | Institute of Information Systems and Marketing |
| IISM | International Institute of Sports Management |
| IISM | International Institute of Sustainability Management |