PPN

PPN may refer to:

• Guillermo León Valencia Airport
• Pre-Pottery Neolithic
• Nigerien Progressive Party-African Democratic Rally (Parti Progressiste Nigérien)
• Pingat Pangkuan Negara, a Malaysian honour
• Pedunculopontine nucleus
• Principal protected note, an investment contract
• Protoplanetary nebula
• Parameterized post-Newtonian formalism, for calculations on gravity
• Pacific Patriot Network

• PPN⁺ or [(Ph₃P)₂N]⁺ cation, produced from Bis(triphenylphosphine)iminium chloride

This disambiguation page lists articles associated with the title PPN.
If an internal link led you here, you may wish to change the link to point directly to the intended article.