| United Systems Institute |
University |
USI |
| Uncommon Schools Inc. |
Organization |
USI |
| Universal Systems, Inc. |
Business Firm |
USI |
| Uthango Social Investments |
Organization |
USI |
| Mabaruma, Guyana |
Regional Airport Code |
USI |
| Universal Serial Interface |
Hardware |
USI |
| Unified Space Intelligence |
Military |
USI |
| Update Software Identity |
Space Science |
USI |
| user-system interface |
Government |
USI |
| User System Interface |
Telecom |
USI |
| Unitray Systems, Inc. |
Business Firm |
USI |
| Mabaruma |
Airport Code |
USI |
| Urban Strategies Inc. |
Organization |
USI |
| Un Satisfactory Inspection |
Military |
USI |
| University of Southern Indiana (Evansville) |
University |
USI |
| United Studies, Inc. |
Organization |
USI |
