English abbreviations from tre to tri
- TRE (Tiree Airport)
- TREA (The Retired Enlisted Association)
- TREADS (Text REading And Summarization System)
- TREAMF (The Retired Enlisted Association Memorial Foundation)
- TREAS (Department of The Treasury)
- TREAT (Treatment Report)
- TREC (Tamworth Regional Entertainment Centre)
- TREDS (Tactical Reconnaissance and Exploitation Demonstration System)
- TREE (Teach Responsibility, Empower, and Educate)
- TREF (Trauma Research and Education Foundation)
- TREI (The Renewable Energy Intiative)
- TREK (Transforming, Restoring, Establishing Kingdom life)
- TREP (Test Report)
- TrES ((telescope) Transatlantic Exoplanet Survey)
- TRESOR (Thrust in Reliable Software Research)
- TREX (Tree Regular Expressions for Xml)
- TRF (Sandefjord Airport, Torp)
- TRFC (Tranmere Rovers Football Club)
- TRFM (Time Resolved Fluorescence Microscopy)
- TRG (Tauranga Airport)
- TRGA (Three Rivers Golf Association)
- TRH (Trona Airport (FAA: L72))
- TRHCA (Tax Relief and Health Care Act of 2006)
- TRI (Tri-Cities Regional Airport)