PDO

PDO refer to:

Chemistry

 * 1,3-Propanediol, an industrial chemical
 * Palladium(II) oxide (PdO)
 * Polydioxanone, a synthetic polymer

Computing

 * PHP Data Objects, a PHP extension that can be used as a database abstraction layer
 * Portable Distributed Objects, a version of Cocoa's Distributed Objects for remote use
 * Process Data Object, a type of protocol frame in some fieldbuses, for instance, CANopen

Entertainment

 * Panzer Dragoon Orta, a 3D shooter created by Smilebit on the Xbox
 * Perfect Dark Zero, a 2005 video game
 * Phoenix Dynasty Online, a 2007 fantasy MMORPG

Other uses

 * ISO 639:pdo or Padoe language, an Austronesian language spoken in South Sulawesi
 * Pacific decadal oscillation, a pattern of climate variation
 * Padre Aldamiz International Airport (Ident: PDO)
 * Petroleum Development Oman, an Omani oil company and the part of the Omani capital region where the company is located
 * Philips and Dupont Optical, a CD manufacturer that was associated with the Compact Disc bronzing issue
 * Protected designation of origin, the name of an area that is used as a designation for an agricultural product or foodstuff
 * Pseudo-differential operator, a concept in mathematical analysis
 * An advanced statistic in ice hockey