PNN may refer to:
National Natural Parks System (Colombia) ( PNN) Parliamentary and News Network, Australia Princeton Municipal Airport (Maine), USA (by IATA code) Probabilistic neural network, in machine learning Pinin, a protein encoded by the PNN gene Hagahai language (ISO 639 code: pnn) VOA-PNN, Voice of America Persian News Network Perineuronal net, in the brain Potsdamer Neueste Nachrichten, newspaper in Potsdam, Germany
See also
Pinin (disambiguation)