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

See also[edit]

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

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