Shipboard Receive Terminal 
Source Routing Transparent 
Station Redesign Team 
System Readiness Test 
Shuttle Requirements Traceability 
Single Rope Technique 
Society of Radiological Technologists 
Source Route Transparent 
Specification Requirements Table 
Supporting Research and Technology 
Systems Reliability Team 
Scene Radiance Tape 
scheduled return time 
Secure Request Technology 
security response team 
Service Routing Transparent 
Ship Receive Terminal 
Shipboard Receive Terminals 
Short Range Telemetry 
Silicon Resistance Thermometer 
simple reaction time 
Simulation Recomputation Tool 
Sludge Retention Time 
solids retention time 
Special Rated Thrust 
Special Reaction Team 
Speech Reception Threshold 
Speech recognition threshold 
spent resin tank 
Standard Remote Terminal