PD
- Antimicrobial Photodynamic Therapy
- Axiom of projective determinacy
- Democratic Party (Indonesia)
- Democratic Party (Italy)
- Democratic Party (Malta)
- Democratic Party (Romania)
- Democratic Party of Albania
- Democratic Party – demokraci.pl
- Doctor of Pharmacy
- Full stop
- Honorverse
- Insex
- International French adjectival system
- PD Draw
- PD resistor
- PD-1
- PD-50
- Padang railway station
- PagerDuty
- Paleolithic diet
- Palladium
- Panic disorder
- Parkinson's disease
- Paroxysmal dyskinesia
- Partial discharge
- Party of Democrats
- Pd test
- Pediatric dentistry
- Pee Dee
- Pentium D
- People's Democracy (Ireland)
- People's Democracy (newspaper)
- Perfect Dark (P2P)
- Peritoneal dialysis
- Personal development
- Personality disorder
- Personnel department
- Peyronie's disease
- Pharmacodynamics
- Phase-change Dual
- Phelps Dodge
- Phenyldichloroarsine
- Photodiode
- Point-defence
- Police department
- Polydipsia
- Polyphony Digital
- Port Dickson (town)
- Porter Airlines
- Postdoctoral
- Potential difference
- Pound (mass)
- Preventive detention
- Price discrimination
- Principia Discordia
- Privatdozent
- Probability of default
- Production designer
- Production diary
- Professional degree
- Professional development
- Program director
- Progressive Democrats
- Progressive disease
- Property damage
- Province of Padua
- Psychotic depression
- Public Debt
- Public defender
- Public domain
- Pulldown (disambiguation)
- Pumpe Düse
- Punitive damages
- Pupillary distance
- Pure Data
- The Plain Dealer