PDN

PDN may refer to:

Digital

 * PDN Gateway (Packet Data Network Gateway),
 * PDN Mail, electronic messaging developed by Prime Computer
 * Public data network
 * Paint.NET

File extension

 * Portable Draughts Notation (.PDN), the standard computer format for recording draughts games
 * .PDN, the native format for the graphics editing program Paint.NET

Publication

 * Pacific Daily News, a newspaper based on Guam
 * Photo District News, US publication for photographers

Entity

 * Department of Physiology, Development and Neuroscience, University of Cambridge
 * National Democratic Party (Argentina) (Partido Demócrata Nacional)

Other

 * ISO 639:pdn or Podena language, spoken in Indonesia
 * Phenotypic disease network (PDN)