VTS can refer to: Vanishing testes syndrome, another name for anorchia Vanishing twin syndrome, a complication of multiple pregnancy Vehicle Telematics System, remote control, monitoring, and navigation of road vehicles Vehicle tracking system, equipment and programs for monitoring road vehicle locations Vessel traffic service, maritime traffic control system for a port or harbor Vertical Tabulation Set, character code 0x8A in the C0 and C1 control codes Virginia Theological Seminary, an Episcopal seminary in Alexandria, Virginia Video Title Set, a directory element on a DVD-Video disk Virtual Tape Server, an IBM Virtual tape library system VTS, an ICAO code for Everts Air