PDA
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PDA may stand for:
- personal digital assistant, a type of handheld computer.
- public display of affection, an area of study within social psychology
- patent ductus arteriosus, a medical term referring to a congenital defect where the ductus arteriosus fails to close after birth
- pushdown automaton, a type of abstract device in automata theory
- Progressive Democrats of America, a Democratic progressive organization in the United States.
- the chemicals polydiacetylenes
- the Polyurea Development Association [1] (http://www.pda-online.org) (see also polyurea)
- Parti Democratique Africain is a political party in Gabon.
- potato dextrose agar, a microbiological media for culturing yeast and fungus.
- Past Doctor Adventures, a series of spin off novels based on the long running BBC science fiction television series Doctor Who and published under the BBC Books imprint.