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 Power Delivery Object, in the USB-C specification
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) 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
See also
Perfect Dark Zero (PD0), a 2005 videogame in the Perfect Dark (Joanna Dark) series Palladium catalysts of the form "Pd(0)"