- The Army Study System
Tactical Air Support Section - Military
Tactical Air Support Squadron - Military
Tactical Air to Surface System - Military (ACAE)
Tactical Analysis Support System (SAUS)
Tactical Armed Surveillance System - Military (ACAE)
Tactical Automated Switch System - U.S. Air Force (MLEX)
Tactical Automatic Switching Center - Communications term (DCT)
Tactical Automatic Switching System (SAUS)
Tactical Avionics System Simulator - Army (MCD)
Tactical Signal Simulator - Canadian Astronautics Ltd. RADAR threat simulation system
Talent Attraction Selection System (SAUS)
Target and Surveillance Systems Ltd. (SAUS)
Tech Assembly System (SAUS)
Technical, Administrative, and Supervisory Section - Amalgamated Union of Engineering Workers - Engineering Section - British
Technical Analytical Study Support (ACAE)
Technical Assembly (SAUS)
Technical Assembly System
Telegraph Automatic Switching System (SAUS)
Telegraphnoye Agentstvo Sovyetskovo Soyuza - Telegraph Agency of the Soviet Union - News agency
Teleprinter Automatic Switching System (NITA)
Terminal Air Surveillance System - FAA (TAG)
Terminal Application Support System (MCD)
Terrain Analyst's Synthesizer Station - Army
Test Automation System Software (SAUS)
Test Automation System Support (SAUS)
The Amateur Sky Survey (SAUS)
Theater Army Signal System (IAA)
Tianjin Academy of Social Sciences - China (BUAC)
Ticlopidine Aspirin Stroke Study (SAUS)
Total Army School System
Towed Acoustic Surveillance System - Marine science (MSC)
Towed Array SONAR System
Towed Array Surveillance System - Navy (CAAL)
Traffic Analysis Systems Study (ACAE)
Transport Aircraft Servicing Specialist (SAUS)
Trojan Automatic Switching System (ACAE)
Trouble Analysis Subsystem (SAUS)
Trouble Analysis System (SAUS)
Trouble Analysis System or Subsystem - Telecommunications (TEL)
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