PDO

PDO is an acronym for:

Pacific Decadal Oscillation, a decadal fluctuation of water temperature in the north-eastern Pacific
Petroleum Development Oman, Omani companies for oil and natural gas production
PHP Data Objects, abstraction layer for database access
Protected Designation of Origin, see Appellation
1,3-propanediol, chemical compound
A communication object, see CANopen
Project documentation

PdO stands for:

639568