| Rank | Abbreviation | Meaning |
|---|
| ***** | IREF | Intégration des Énergies Renouvelables à la Ferme
| |
| **** | IREF | Integrated Renewable Energy Farm
| |
| **** | IREF | International Review of Economics and Finance
| |
| **** | IREF | INVESCO Real Estate Fund
| |
| **** | IREF | International Reformed Evangelical Fellowship
| |
| *** | IREF | International Real Estate Federation
| |
| *** | IREF | Ischemia Research and Education Foundation
| |
| *** | IREF | Island Radio Expedition Foundation, Inc.
| |
| *** | IREF | India Relief Education Fund
| |
| *** | IREF | India Rural Evangelical Fellowship
| |
| *** | IREF | Italian Real Estate Fund
| |
| *** | IREF | International Real Estate Fund
| |
| ** | IREF | Infarct-Related Ejection Fraction
| |
| * | IREF | Islamic Real Estate Fund
| |
| * | IREF | Islamic Research & Educational Foundation
| |
| * | IREF | International Road Educational Foundation
| |
| * | IREF | Institute for Research on Economic and Fiscal
| |
| * | IREF | Indian Relief and Education Fund
| |
| * | IREF | interdependence of regional expiratory flow
| |
| * | IREF | Invalda Real Estate Fund
| |
| * | IREF | Islamic Real Estate Finance
| |
| * | IREF | Islamic Real Estate Financing
| |
| * | IREF | Interim Rural Energy Fund
| |