PDU may stand for: Project for Democratic Union, a European open-source think tank Partia për Drejtësi dhe Unitet (Party for Justice and Unity), a former political party in Albania Partidul Democrat al Unirii (Democratic Union Party), a political group in Romania Paysandú Airport (IATA: PDU) Power distribution unit, for electrical power Protocol data unit, in telecommunications Procedure defined unit, a unit of measurement relative to a specific application Professional Development Units, credits toward certification or re-certification at Project Management Institute (PMI)