PDO

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

• 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

• 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

• 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)
• Performing the Duties of, a description for acting officials
• 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
• "Paid day off", a type of paid time off

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• Perfect Dark Zero (PD0), a 2005 videogame in the Perfect Dark (Joanna Dark) series
• Palladium catalysts of the form "Pd(0)"
• {{srt}}

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