| Abbreviation | Definition |
|---|---|
| USI | United Systems Institute |
| USI | University of Southern Indiana |
| USI | University of Southern Indiana ( Evansville) |
| USID | Universities Scientometrics Information Database |
| USIF | University Sophisticated Instruments Facility |
| USIF | University Spectroscopy and Imaging Facilities |
| USIL | Undergraduate Students In Linguistics |
| USIM | University Sains Islam Ma |
| USIMS | University of Sydney Institute of Marine Science |
| USIN | Universidad Salvadore a Isaac Newton |
| USIP | University of the Sciences In Philadelphia |
| USIS | The University Of Sussex Information Service |
| USIS | University Studies Informational System |
| USIT | University of Sheffield Information Technology |
| USIT | University School of Information Technology |
| USIT | University Securities Investment Team |
| USIU | United States International University |
| USJ | Universite Saint Joseph |
| USJ | University of Saint Joseph |
| USJ | University of San Jose |