- The Arthur Ransome Society - British (EAIO)
Tactical Aerial Reconnaissance and Surveillance Needs (SAUS)
Tactical Air Reconnaissance School - Air Force
Tactical Air Reconnaissance/Surveillance (SAUS)
Tactical Air Reconnaissance System (SAUS)
Tactical Air Research and Survey Office - Air Force
Tactical Reconnaissance and Surveillance (SAUS)
Target Acquisition Radar System (SAUS)
Target Acquisition Reconnaissance and Surveillance System (SAA)
Technical Aircraft Reliability Statistics (IAA)
Technical Assistance Recruitment Service - United Nations
Teen Age Republicans
Terminal Automated RADAR Services - Aviation (FAAC)
Terrain Analog RADAR Simulator
Terrain and RADAR Simulator (IAA)
Terrain Avoidance RADAR System (MCD)
Test and Repair Station
Tethered Aerostat RADAR System - Aviation (FAAC)
Theater Army Replacement System (AABC)
Three-Axes Reference System (SAUS)
Three-Axis Reference System - Used in reference to Titan missile
Threonyl-tRNA Synthetase - Medicine (EDAA)
Thrombocytopenia with Absent Radii Syndrome - Medicine (EDAA)
Trade Acceptance and Reconciliation Service (EXCG)
Training and Administrative Reserves - on permanent active duty
Transportation Aircraft Rebuild Shops - National Guard (MCD)
Transportation Automated Routing System (SAUS)
Turn Around Ranging Station (SAUS)
Turnaround Ranging Station - Telecommunications (TEL)