The acronym SST may refer to:in aircraft and naval vehiclesSupersonic transport (SST), civil aircraft for transporting passengers faster than the speed of sound.US Navy hull classification symbol for Training SubmarinesScaled Composites SpaceShipTwo in popular culture and mediaSST Records, an independent record labelSega Sound Team, a Japanese music band.Starship Troopers, a science fiction book by Robert A. HeinleinStarship Troopers (film), a film loosely based on the book by Robert A. Heinlein… (More on Sst)