SST

The acronym SST may refer to:

Scaled Composites SpaceShipTwo
SST class blimp
Supersonic transport (SST), civil aircraft for transporting passengers faster than the speed of sound
US Navy hull classification symbol for Training Submarines

Special Security Team, a counter-terrorist unit of the Japanese Coast Guard
Streamlined Sales Tax Project, an effort to standardize the way states in the United States tax goods
Swiss Solvency Test, a framework for the regulation of the insurance industry in Switzerland
Safe Secure Trailer, a modified 18-wheel cargo truck used by the United States Office of Secure Transportation to move specialized cargoes, such as nuclear weapons

Salo-Salo Together ("SST"), a defunct Philippine noontime variety show aired over GMA Network from 1993 to 1995
The Samoan Swat Team ("The Headshrinkers"), a professional wrestling tag team
Sega Superstars Tennis, a 2008 video game featuring Sega's mascots playing tennis
SST Band ("Sega Sound Team"), a Japanese music band
SST Records, an independent record label
Starship Traders, a multiplayer webgame
Starship Troopers, a science fiction book by Robert A. Heinlein
Starship Troopers (film), a film loosely based on the book by Robert A. Heinlein of the same name

Menter’s Shear Stress Transport, turbulence model in fluid dynamics
Mitsubishi SST, a concept car by Mitsubishi
School of Science and Technology, a magnet program within Merlo Station High School with emphasis on the sciences and technology
School of Science and Technology, Singapore, a Specialised Independent School in Singapore
Sea surface temperature
Serum-separating tube, a particular type of evacuated tube used during venipuncture
Shiva Smart Tunneling, a simple VPN tunneling protocol in Eicon Shiva series VPN gateway products
Shortest spanning tree, in graph theory
Silicon Storage Technology, Inc, a manufacturer of flash parts
Social skills training, in educational psychology training students with special needs (like autism) social skills to help with inclusion
Somatostatin, a peptide hormone
Space Surveillance Telescope, ground-based space surveillance technology developed by DARPA
Spitzer Space Telescope, a space observatory observing in the infrared launched in 2003
Steady state topography, a research methodology in cognitive neuroscience and neuromarketing
Structured Stream Transport, a data transport protocol still under development by MIT
Swedish Solar Telescope (Swedish 1-m Solar Telescope), a telescope dedicated to observing the Sun
Total sum of squares, SST or TSS
Twin Clutch SST, a twin-clutch transmission developed by Mitsubishi