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PPN may refer to:

  • Guillermo León Valencia Airport
  • Pre-Pottery Neolithic
  • Pinoleville Pomo Nation
  • Nigerien Progressive Party-African Democratic Rally, from the French acronym, Parti Progressiste Nigérien
  • Pandit Pran Nath
  • Parameterized post-Newtonian formalism
  • Pingat Pangkuan Negara, a Malaysian honour
  • Pedunculopontine nucleus
  • Principal protected note, an investment product
  • Protoplanetary nebula
  • Parameterized post-Newtonian formalism, a classification system for different theories of gravity
  • Pure proportional navigation, a variant of proportional navigation in which acceleration commands are perpendicular to the velocity vector of the missile
  • Pharmacy Product Number
  • Pacific Patriot Network