Transportation Security Administration 
Target Service Agent 
Training Support Agency 
Technical Support Activity 
Training Situation Analysis 
Tax Sheltered Annuity 
Technical Support Alliance 
Theater Storage Area 
Time Series Analysis 
Training Support Agent 
thermal swing adsorption 
Tourism Satellite Account 
Transuranic storage area 
Tapered-Slot Antenna 
Taxiway Safety Area 
Technical Systems Audit 
Technology Student Association 
Telecommunications System Architecture 
Telephony Services Architecture 
Temperature Swing Absorption 
Temperature-Swing Adsorption 
Temporary Segregated Airspace 
Test Start Approval 
Thorax Side Airbag 
Time Slot Allocation 
Time Slot Assignment 
Tool Stowage Assembly 
total shoulder arthroplasty 
total surface area 
Tourette Syndrome Association