URSI
| Acronym | Definition |
|---|---|
| URSI | Union Radio-Scientifique Internationale (French: International Union for Radio Science) |
| URSI | Urban and Regional Studies Institute (various locations) |
| URSI | Undergraduate Research Summer Institute |
| URSI | United Recovery Systems, Inc. (Texas) |
| URSI | International Union of Radio Science, IEEE (Institute of Electrical and Electronics Engineers) |