NASA Abbreviations and Acronyms
- SEUSingle Event Upsets
- SISSail Interface System
- SISSerial Input Special
- SISSimulator Interface System (subsystem)
- SISStandard Interface Specification
- spTSupport
- spTSteering Position Transducer
- spTSpecial Performance Test
- STRStructural
- STRStructure
- STRScience Tape Recorder
- STRSystem Test Review
- STRLstructural
- TASTrue Airspeed
- UUpper
- USNUnited States Navy
- USNUnited Space Network
- ACLAccess Control List
- ACLAscent Closed Loop
- ACLAllowable Container Load
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