Eugene Stoner - NCIC firearms make code (NCIC)
Santa Anna Di Valdieri - Italy - Seismograph station code, US Geological Survey (SEIS)
Satellite Test Vehicle (IAA)
Satellite Transfer Vehicle (SAUS)
Scottish Television (DI)
Seelye Stevenson Value & Knecht (EFIS)
Separation Test Vehicle
Service Topographique (GIS)
Short-Term Variability (STED)
Short-Tube Vertical - Evaporator
Single Transferable Vote
Slaved-Tandem Free-Wing (SAUS)
Small Test Vessel - Nuclear energy (NRCH)
Soft-Tissue View - Radiology (DAVI)
Solar Thermal Vacuum
Solar Thermo Vacuum (SAUS)
Solidaridad de Trabajadores Vascos - Solidarity of Basque Workers - In exile - Spain
Southern Aviation Ltd. - Ghana - ICAO designator (FAAC)
Southern Television - British (DI)
Space Test Vehicle - NASA (KSC)
Space Transfer Vehicle (SAUS)
Special Test Vehicle
Spectral Tristimulus Value (SAUS)
Sprint Telecommunications Venture (SAUS)
Standardized Test Vehicle (SAUS)
Standard Tactical Vehicle (SAUS)
Standard Test Vehicle
Staverton - England - Airport symbol (AD)
Steam Tank Vessel (DNAB)
Steerable Low-Light-Level Television (PDAA)
Steerable Low-Light TV (SAUS)
Stikine Silver - Vancouver Stock Exchange symbol
Stonewall, TX - Location identifier - FAA (FAAL)
Stove - Classified advertising (ADA)
Structural Test Vehicle - NASA (KSC)
ST-TFF- The Final Frontier Star Trek - Movie (CAL)
St. Thomas - Diocesan abbreviation - Virgin Islands (TOCD)
STV Group, Inc. - Associated Press (SAG)
Submarine Target Vessel (NVT)
Submersible Transport Vehicle (SAUS)
Subscription Television
Subscription Television Authority - FCC (NTCM)
Subscription TV, Inc. (NTCM)
Suction Throttling Valve (SAUS)
Superior Temporal Vein - Medicine (DMAA)
Supersonic Test Vehicle (AAG)
Surrogate Teleoperated Vehicle (SAUS)
Surrogat Test Vehicle (SAUS)
Surveillance Television (AFM)