HDP may refer to: Political parties Free Democratic Party (Turkey) (Turkish: ), in Turkey; defunct Hazara Democratic Party, in Pakistan Peoples' Democratic Party (Turkey) (Turkish: ), in Turkey Science and technology Hemodialysis product HD Photo, a graphics file format Health Device Profile, a Bluetooth profile Heme ligase, an enzyme Hierarchical decision process Hierarchical Dirichlet process, a stochastic process High-density plasma, a type of plasma (physics) Hurricane Destruction Potential Hydrocarbon dew point Hydroxypropyl distarch phosphate, a starch Other uses HDP (album), an album of Czech hip-hop group Prago Union Hadapsar railway station, in India Harness, Dickey & Pierce, an intellectual property law firm Heritage Documentation Programs of the United States National Park Service Historical Dictionary Project of the Hebrew Language Hortonworks, an American software company