PDO
- 1,3-Propanediol
- Advanced statistics (ice hockey)
- Compact Disc bronzing
- PHP Data Objects
- Pacific decadal oscillation
- Padre Aldamiz International Airport
- Palladium catalyst
- Palladium(II) oxide
- Panzer Dragoon Orta
- Perfect Dark Zero
- Performing the Duties of
- Petroleum Development Oman
- Phoenix Dynasty Online
- Polydioxanone
- Portable Distributed Objects
- Process Data Object
- Protected designation of origin
- Pseudo-differential operator