PDA
- 1969 Talladega 500
- Alternative Democratic Pole
- Audio Adrenaline (album)
- List of political parties in Aruba
- Movement of Democratic Action
- P.D.A. (We Just Don't Care)
- PDA (Interpol song)
- PDA (The Office)
- Pancreatic ductal adenocarcinoma
- Parenteral Drug Association
- Parts departing aircraft
- Party of Democratic Action
- Past Doctor Adventures
- Patent ductus arteriosus
- Pathological demand avoidance
- Patron-driven acquisition
- Personal digital assistant
- Peruvian Debate Association
- Pharmacists' Defence Association
- Photodiode array
- Pinoy Dream Academy
- Pitch detection algorithm
- Polydiacetylenes
- Population and Community Development Association
- Posterior descending artery
- Potato dextrose agar
- Predictive analytics
- Pregnancy Discrimination Act
- Presidential Drawdown Authority
- Private defense agency
- Progressive Democratic Alliance
- Progressive Democrats of America
- Pub Design Awards
- Public development authority
- Public display of affection
- Pushdown automaton
- Scottish Qualification Authority
- This Is Us (Backstreet Boys album)