MVSN may refer to: Paramilitary organizations 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 Companies Macrovision, the former name of the software company Rovi Corporation.