PDS was renamed as United Pasokmomogun Kadazandusun Murut Organisation (UPKO) or "Pertubuhan Pasokmomogun Kadazandusun Murut Bersatu" (UPKO) on 8 August 1999, taking the same acronym of the now defunct original United Pasokmomogun Kadazan Organisation, which was formed and dissolved in the 1960s by Fuad Stephens.