VSI

VSI may stand for:

• Vertical shaft impactor, a type of impact crusher
• Vertical speed indicator, an instrument in an aircraft monitoring rate of descent or climb
• Very Short Introductions, a series of books published by Oxford University Press
• Virtual Switching Instance, in VPLS
• Voluntary Service International, the Irish branch of Service Civil International
• VMS Software Inc. A vendor/supporter of OpenVMS related software.
• VSI Group, British dubbing and translation company
  • VSI Berlin GmbH, German subsidiary
  • VSI Translation & Subtitling BV, Dutch subsidiary
• Vendor's Single Interest insurance, a type of insurance that only protects the lien holder, as opposed to dual coverage insurance
• Voltage Source Inverter, DC to AC converter