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MVSN may refer to:

  • Milizia Volontaria per la Sicurezza Nazionale, better known as the Blackshirts, the Italian Fascist paramilitary groups
  • Milice de Volontaires de la Sécurité Nationale, better known as the Tonton Macoute, a Haitian paramilitary force created in 1959
  • Macrovision, the former name of the software company Rovi Corporation.