sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Solomon Islands Rugby Union | ** |
| Southern Inland Rugby Union | ** |
| Self Institution Research Unit | * |
| Strategic Information and Research Unit | * |
| Sistema Informativo Regione Umbria | * |
| Soils and Irrigation Research Unit | * |
| Scalable Inertial Reference Unit | * |
| Stichting Instuiven Regio Utrecht | * |
| Saint Ivan Rilski University | * |