Underwater Tracking Range
UNIVERSAL TONE RECEIVER
university training reactor
Uptime Ratio
Unicode Technical Report
Union Transportation
Unique Tax Reference
unit test report
United Teachers of Richmond
Unitrin, Inc.
Universal Teaching Reactor
Universal Training Reactor
Universal Transaction Record
University of Texas at Richardson
University technical representative
untrained
untranslated
untranslated leader region
untranslated region
untranslated regions
Utair South Africa