# PD

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> Source: https://en.wikipedia.org/wiki/PD
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> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

"PDs" redirects here. For other uses, see [PDS](/source/PDS_(disambiguation)).

**PD**, **P.D.**, or **Pd** may refer to:

## Arts and media

- [*People's Democracy* (newspaper)](/source/People's_Democracy_(newspaper)), weekly organ of the Communist Party of India (Marxist)
- *[The Plain Dealer](/source/The_Plain_Dealer)*, a Cleveland, Ohio, US newspaper
- Post Diaspora, a time frame in the *[Honorverse](/source/Honorverse)* series of science fiction novels
- *[Principia Discordia](/source/Principia_Discordia)*, a 1965 holy text in Discordianism
- [Production designer](/source/Production_designer), a profession in film or television
- [Production diary](/source/Production_diary), a promotional video podcast
- [Public domain](/source/Public_domain), a copyright status

## Economics and business

- [Personnel department](/source/Personnel_department), of an organization
- [Price discrimination](/source/Price_discrimination), a microeconomic pricing strategy
- [Probability of default](/source/Probability_of_default), used in finance (Basel II)
- [Professional degree](/source/Professional_degree), or first professional degree
- [Professional development](/source/Professional_development), learning to earn or maintain professional credentials
- [Program director](/source/Program_director), in service industries
- [Public Debt](/source/Public_Debt), of a government

## Organizations

### Companies

- [Phelps Dodge](/source/Phelps_Dodge), a former American mining company, now part of Freeport-McMoRan
- [Polyphony Digital](/source/Polyphony_Digital), developer of the Gran Turismo video game series
- [Porter Airlines](/source/Porter_Airlines) (IATA airline designator), a regional airline headquartered at Billy Bishop Toronto City Airport, Canada

### Government and law

- [Police department](/source/Police_department)
- [Preventive detention](/source/Preventive_detention), an imprisonment that is putatively justified for non-punitive purposes
- [Property damage](/source/Property_damage) liability, in insurance
- [Public defender](/source/Public_defender), an attorney appointed to represent people who cannot afford to hire one
- [Public domain](/source/Public_domain), works whose exclusive intellectual property rights are no longer valid
- [Punitive damages](/source/Punitive_damages)

### Political parties

- [Democratic Party of Albania](/source/Democratic_Party_of_Albania) (*Partia Demokratike*), a centre-right political party in Albania
- [Democratic Party (Indonesia)](/source/Democratic_Party_(Indonesia)) (*Partai Demokrat*), a political party in Indonesia
- [Democratic Party (Italy)](/source/Democratic_Party_(Italy)) (*Partito Democratico*), a centre-left political party in Italy
- [Democratic Party (Malta)](/source/Democratic_Party_(Malta)) (*Partit Demokratiku*), a centre-left political party in Malta
- [Democratic Party (Romania)](/source/Democratic_Party_(Romania)) (*Partidul Democrat*), a social-democratic and, later, a centre-right political party in Romania
- [Democratic Party – demokraci.pl](/source/Democratic_Party_%E2%80%93_demokraci.pl) (*Partia Demokratyczna – demokraci.pl*), Poland
- [Party of Democrats](/source/Party_of_Democrats) (*Partito dei Democratici*), a defunct political party in San Marino
- [People's Democracy (Ireland)](/source/People's_Democracy_(Ireland)), a defunct political organization in Ireland
- [Progressive Democrats](/source/Progressive_Democrats), a defunct political party in the Republic of Ireland
- , a political party in Puerto Rico

## Places

- [Province of Padua](/source/Province_of_Padua) (ISO 3166-2:IT), Italy
- [Port Dickson (town)](/source/Port_Dickson_(town)), a coastal city in Negeri Sembilan, Malaysia

## Professions

- [Doctor of Pharmacy](/source/Doctor_of_Pharmacy), also abbreviated PharmD
- [Postdoctoral](/source/Postdoctoral), a research position or course of study
- *[Privatdozent](/source/Privatdozent)*, a title or position especially in German universities
- [Production designer](/source/Production_designer), a profession in film or television

## Science and technology

### Medicine

- [Paleolithic diet](/source/Paleolithic_diet), a diet based on presumed ancient diets
- [Panic disorder](/source/Panic_disorder), a condition with excessive fear or anxiety
- [Parkinson's disease](/source/Parkinson's_disease), a degenerative neurological condition
- [Paroxysmal dyskinesia](/source/Paroxysmal_dyskinesia), a group of movement disorders
- [Pediatric dentistry](/source/Pediatric_dentistry), mouth health care and tooth repair for children
- [Peritoneal dialysis](/source/Peritoneal_dialysis), a way to filter the blood when the kidneys are not working well
- [Personality disorder](/source/Personality_disorder), any of various psychiatric problems
- [Peyronie's disease](/source/Peyronie's_disease), a connective tissue disorder involving the growth of fibrous plaques in the soft tissue of the penis
- [Pharmacodynamics](/source/Pharmacodynamics), the study of how a drug affects an organism
- [Phenyldichloroarsine](/source/Phenyldichloroarsine), a blister agent and vomiting agent
- [Polydipsia](/source/Polydipsia), excessive thirst
- [Progressive disease](/source/Progressive_disease), a disease that continues to worsen and often has no proven total cure
- [Psychotic depression](/source/Psychotic_depression), a major depressive episode that is accompanied by psychotic symptoms
- [Pupillary distance](/source/Pupillary_distance), in optometry

### Computing

- [USB PD (USB Power Delivery)](/source/USB_hardware#USB_Power_Delivery), an extension of the USB standard
- [pandas (software)](/source/Pandas_(software)), package for data manipulation and analysis in the Python programming language
- [Pentium D](/source/Pentium_D), a dual-core variant of the Pentium 4 processor
- [Perfect Dark (P2P)](/source/Perfect_Dark_(P2P)), a Japanese peer-to-peer file-sharing (P2P) application designed for use with Microsoft Windows
- [Phase-change Dual](/source/Phase-change_Dual), an optical media format
- [Pure Data](/source/Pure_Data), a graphical audio-processing language

### Physics

- [Photodiode](/source/Photodiode), a semiconductor device that converts light into current
- [Potential difference](/source/Potential_difference), or voltage
- [Partial discharge](/source/Partial_discharge), an undesirable discharge phenomenon in high voltage dielectrics

### Other uses in science and technology

- [PD resistor](/source/PD_resistor), a pull-down resistor
- [Pd test](/source/Pd_test), the outcome of using a drop of para-phenylenediamine (also abbr. "Pd") to identify lichens
- [Palladium](/source/Palladium), symbol Pd, a chemical element
- Photodisinfection, an alternative name for [Antimicrobial Photodynamic Therapy](/source/Antimicrobial_Photodynamic_Therapy)
- [Point-defence](/source/Point-defence), a category of weapons
- [Axiom of projective determinacy](/source/Axiom_of_projective_determinacy), in mathematical logic
- [Pumpe Düse](/source/Pumpe_D%C3%BCse), a Volkswagen Group name for Unit Injector diesel engine technology

## Other uses

- The NYSE ticker symbol of [PagerDuty](/source/PagerDuty)
- [Padang railway station](/source/Padang_railway_station), West Sumatra, Indonesia (station code)
- [Full stop](/source/Full_stop) (or period, in American English), used in coded military communications
- [Personal development](/source/Personal_development), as used in the self-help and personal growth requiring fields
- *peu difficile*, in mountaineering, "little difficult" climbing grade [International French adjectival system](/source/International_French_adjectival_system)

## See also

- *[PD-50](/source/PD-50)*, a 1979 currently non-floating floating dry dock made in Sweden
- [PD Draw](/source/PD_Draw), a bridge over the Passaic River, New Jersey, US
- [PD-1](/source/PD-1), a cell surface receptor protein
- *pd*, the nickname of Brent Scott, the founder of the website [Insex](/source/Insex)
- [Pee Dee](/source/Pee_Dee)
- [Pound (mass)](/source/Pound_(mass))
- [Pulldown (disambiguation)](/source/Pulldown_(disambiguation))

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Adapted from the Wikipedia article [PD](https://en.wikipedia.org/wiki/PD) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/PD?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.