PDK
- DeKalb–Peachtree Airport
- Democratic Party of Kosovo
- Kurdistan Democratic Party
- Kurdistan Democratic Party (Iran)
- PDK (Namibian music group)
- PDK International
- Party of Democratic Kampuchea
- Phosphoinositide-dependent kinase-1
- Pind Dadan Khan
- Polydiketoenamine
- Process design kit
- Pyruvate dehydrogenase kinase
- The Christians (Norway)