VST is a three-letter abbreviation with multiple meanings:
- Voice Systems Technology, Inc., a Delaware corporation that sold Prepaid and Voicemail products based on Voice Systems Technology, Inc.'s software to landline and wireless carriers from 1991 until sold to Boston Communications Group, Inc. in 1996.
- Vancouver School of Theology, a multi-denominational theological graduate school located on the perimeter of the University of British Columbia campus on the University Endowment Lands, Vancouver, British Columbia, Canada
- VST, the IATA airport code for Stockholm-Västerås Airport in Sweden
- Virtual Studio Technology, Steinberg's standard for audio plug-ins
- in particular, may refer to some versions of the Steinberg Cubase program
- Towner Railway (reporting mark)
- Vakarų skirstomieji tinklai, an electricity supply corporation in western Lithuania
- VLT Survey Telescope, a wide-field telescope on Cerro Paranal, Chili
- Venezuela Standard Time, Venezuela's time zone
- VST Industries, Hyderabad, India