The abbreviation stands for MWI:

  • Message Waiting Indicator, a feature of ISDN and the system telephone systems, which signals in the presence of new messages on the voice mailbox that the terminal
  • The country code for Malawi
  • Many Worlds interpretation of German many-worlds interpretation, a paradigm for understanding the quantum mechanics
  • Mission Scientific Institute Missio, an institute for the advancement of science, research and teaching in Catholic missionary work and in the world- church context
  • Disambiguation
  • Abbreviation