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


Arts and media

* ''People's Democracy'' (newspaper), weekly organ of the Communist Party of India (Marxist) * ''
The Plain Dealer ''The Plain Dealer'' is the major newspaper of Cleveland, Ohio; it is a major national newspaper. In the fall of 2019, it ranked 23rd in U.S. newspaper circulation, a significant drop since March 2013, when its circulation ranked 17th daily an ...
'', a Cleveland, Ohio, US newspaper * Post Diaspora, a time frame in the ''
Honorverse The Honorverse is a military science fiction book series, its two subseries, two prequel series, and anthologies created by David Weber and published by Baen Books. They are centered on the space navy career of the principal protagonist Ho ...
'' series of science fiction novels * ''
Principia Discordia The ''Principia Discordia'' is the first published Discordianism, Discordian religious text. It was written by Greg Hill (Malaclypse the Younger) with Kerry Wendell Thornley (Lord Omar Khayyam Ravenhurst) and others. The first edition was printed ...
'', a 1965 holy text in Discordianism *
Production designer In film and television, a production designer is the individual responsible for the overall aesthetic of the story. The production design gives the viewers a sense of the time period, the plot location, and character actions and feelings. Work ...
, a profession in film or television * Production diary, a promotional video podcast *
Public domain The public domain (PD) consists of all the creative work to which no Exclusive exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly Waiver, waived, or may be inapplicable. Because no one holds ...
, a copyright status


Economics and business

* Personnel department, of an organization *
Price discrimination Price discrimination (differential pricing, equity pricing, preferential pricing, dual pricing, tiered pricing, and surveillance pricing) is a Microeconomics, microeconomic Pricing strategies, pricing strategy where identical or largely similar g ...
, a microeconomic pricing strategy *
Probability of default Probability of default (PD) is a financial term describing the likelihood of a default over a particular time horizon. It provides an estimate of the likelihood that a borrower will be unable to meet its debt obligations. PD is used in a varie ...
, used in finance (Basel II) *
Professional degree A professional degree, formerly known in the US as a first professional degree, is a degree that prepares someone to work in a particular profession, practice, or industry sector often meeting the academic requirements for licensure or accreditatio ...
, or first professional degree *
Professional development Professional development, also known as professional education, is learning that leads to or emphasizes education in a specific professional career field or builds practical job applicable skills emphasizing Praxis (process), praxis in addition t ...
, learning to earn or maintain professional credentials * Program director, in service industries *
Public Debt A country's gross government debt (also called public debt or sovereign debt) is the financial liabilities of the government sector. Changes in government debt over time reflect primarily borrowing due to past government deficits. A deficit occu ...
, of a government


Organizations


Companies

*
Phelps Dodge Phelps Dodge Corporation was an American mining company founded in 1834 as an import-export firm by Anson Greene Phelps and his two sons-in-law William Earle Dodge, Sr. and Daniel James. The latter two ran Phelps, James & Co., the part of the ...
, a former American mining company, now part of Freeport-McMoRan *
Polyphony Digital Polyphony Digital Inc. is an internal Japanese first-party video game development studio for PlayStation Studios. Originally a development group within Sony Computer Entertainment's Japan Studio known as Polys Entertainment, after the succes ...
, developer of the Gran Turismo video game series *
Porter Airlines Porter Airlines (stylized in Letter case#All lowercase, all lowercase as porter) is a Canadian airline headquartered at Billy Bishop Toronto City Airport in Toronto. It is the third largest airline in Canada, behind Air Canada and WestJet. Owned ...
(IATA airline designator), a regional airline headquartered at Billy Bishop Toronto City Airport, Canada


Government and law

*
Police department The police are a constituted body of people empowered by a state with the aim of enforcing the law and protecting the public order as well as the public itself. This commonly includes ensuring the safety, health, and possessions of citize ...
*
Preventive detention Preventive detention is an imprisonment that is putatively justified for non- punitive purposes, most often to prevent further criminal acts. Preventive detention sometimes involves the detention of a convicted criminal who has served their sente ...
, an imprisonment that is putatively justified for non-punitive purposes *
Property damage Property damage (sometimes called damage to property) is the damage or destruction of real or tangible personal property, caused by negligence, willful destruction, or an act of nature. Destruction of property (sometimes called property de ...
liability, in insurance *
Public defender A public defender is a lawyer appointed to represent people who otherwise cannot reasonably afford to hire a lawyer to defend themselves in a trial. Several countries provide people with public defenders, including the UK, Belgium, Hungary and Si ...
, an attorney appointed to represent people who cannot afford to hire one *
Public domain The public domain (PD) consists of all the creative work to which no Exclusive exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly Waiver, waived, or may be inapplicable. Because no one holds ...
, works whose exclusive intellectual property rights are no longer valid *
Punitive damages Punitive damages, or exemplary damages, are damages assessed in order to punish the defendant for outrageous conduct and/or to reform or deter the defendant and others from engaging in conduct similar to that which formed the basis of the lawsuit. ...


Political parties

*
Democratic Party of Albania The Democratic Party of Albania (, PDSH), also known as the Democratic Party (, PD), is a Conservatism, conservative political party in Albania. It has been the largest opposition party in the country since 2013 and has dominated the Albanian ...
(''Partia Demokratike''), a centre-right political party in Albania *
Democratic Party (Indonesia) The Democratic Party (, , sometimes abbreviated to PD) is a centre to centre-right nationalist political party in Indonesia. Currently, it holds 44 seats in the House of Representatives (DPR). It is led by Agus Harimurti Yudhoyono (AHY), the s ...
(''Partai Demokrat''), a political party in Indonesia *
Democratic Party (Italy) The Democratic Party (, PD) is a Social democracy, social democratic political party in Italy. The party's secretary is Elly Schlein, elected in the 2023 Democratic Party (Italy) leadership election, 2023 leadership election, while the party's ...
(''Partito Democratico''), a centre-left political party in Italy * Democratic Party (Malta) (''Partit Demokratiku''), a centre-left political party in Malta *
Democratic Party (Romania) The Democratic Party (, PD; also known as ''Partidul Democrat-Frontul Salvării Naționale'' or PD-FSN for short) was a Social democracy, social democratic and, later on, Liberal conservatism, liberal conservative list of political parties in Roma ...
(''Partidul Democrat''), a social-democratic and, later, a centre-right political party in Romania * Democratic Party – demokraci.pl (''Partia Demokratyczna – demokraci.pl''), Poland *
Party of Democrats The Party of Democrats (, PD) was a social democracy, social-democratic and Democratic socialism, democratic socialist list of political parties in San Marino, political party in San Marino. Its counterpart in Italy was the Democrats of the Left. ...
(''Partito dei Democratici''), a defunct political party in San Marino *
People's Democracy (Ireland) People's Democracy (PD; ) was a political organisation that arose from the Northern Ireland civil rights movement. It held that civil rights could be achieved only by the establishment of a socialist republic for all of Ireland. It demanded m ...
, a defunct political organization in Ireland *
Progressive Democrats The Progressive Democrats (, literally "The Democratic Party"), commonly referred to as the PDs, were a conservative liberal political party in Ireland. The party's history spanned 24 years, from its formation in 1985 to its dissolution in 20 ...
, a defunct political party in the Republic of Ireland * , a political party in Puerto Rico


Places

*
Province of Padua The province of Padua () is a Provinces of Italy, province in the Veneto region of Italy. Its capital is the city of Padua. Geography It has an area of 2,142 km2, and a total population of 936,492 (2016) making it the most populated provi ...
(ISO 3166-2:IT), Italy *
Port Dickson (town) Port Dickson (Negeri Sembilan Malay: ), colloquially referred to as PD, is a beach resort in Port Dickson District, Negeri Sembilan, Malaysia. It is the second largest urban area in the state after Seremban, the state capital. The town's admi ...
, a coastal city in Negeri Sembilan, Malaysia


Professions

*
Doctor of Pharmacy A Doctor of Pharmacy (PharmD; Neo-Latin: ''Pharmaciae Doctor'') is a professional doctorate in pharmacy. In some countries, it is a proficient graduate degree to practice the profession of pharmacy or to become a clinical pharmacist. In many co ...
, also abbreviated PharmD *
Postdoctoral A postdoctoral fellow, postdoctoral researcher, or simply postdoc, is a person professionally conducting research after the completion of their doctoral studies (typically a PhD). Postdocs most commonly, but not always, have a temporary acade ...
, a research position or course of study * ''
Privatdozent ''Privatdozent'' (for men) or ''Privatdozentin'' (for women), abbreviated PD, P.D. or Priv.-Doz., is an academic title conferred at some European universities, especially in German-speaking countries, to someone who holds certain formal qualifi ...
'', a title or position especially in German universities *
Production designer In film and television, a production designer is the individual responsible for the overall aesthetic of the story. The production design gives the viewers a sense of the time period, the plot location, and character actions and feelings. Work ...
, a profession in film or television


Science and technology


Medicine

*
Paleolithic diet The Paleolithic diet, Paleo diet, caveman diet, or Stone Age diet is a modern fad diet consisting of foods thought by its proponents to mirror those eaten by humans during the Paleolithic era. The diet avoids food processing and typically incl ...
, a diet based on presumed ancient diets *
Panic disorder Panic disorder is a mental disorder, specifically an anxiety disorder, characterized by reoccurring unexpected panic attacks. Panic attacks are sudden periods of intense fear that may include palpitations, sweating, shaking, shortness of breath ...
, a condition with excessive fear or anxiety *
Parkinson's disease Parkinson's disease (PD), or simply Parkinson's, is a neurodegenerative disease primarily of the central nervous system, affecting both motor system, motor and non-motor systems. Symptoms typically develop gradually and non-motor issues become ...
, a degenerative neurological condition * Paroxysmal dyskinesia, a group of movement disorders *
Pediatric dentistry Pediatric dentistry (formerly pedodontics in American English or paedodontics in Commonwealth English) is the branch of dentistry dealing with children from birth through adolescence. The specialty of pediatric dentistry is recognized by the Amer ...
, mouth health care and tooth repair for children *
Peritoneal dialysis Peritoneal dialysis (PD) is a type of kidney dialysis, dialysis that uses the peritoneum in a person's abdomen as the membrane through which fluid and dissolved substances are exchanged with the blood. It is used to remove excess fluid, correct e ...
, a way to filter the blood when the kidneys are not working well *
Personality disorder Personality disorders (PD) are a class of mental health conditions characterized by enduring maladaptive patterns of behavior, cognition, and inner experience, exhibited across many contexts and deviating from those accepted by the culture. ...
, any of various psychiatric problems *
Peyronie's disease Peyronie's disease (PD) is a benign, acquired penile connective tissue disease characterized by the occurrence of fibrotic plaques within the Tunica albuginea (penis), tunica albuginea — the dense elastic covering of the Corpora cavernosa of pe ...
, a connective tissue disorder involving the growth of fibrous plaques in the soft tissue of the penis *
Pharmacodynamics Pharmacodynamics (PD) is the study of the biochemistry, biochemical and physiology, physiologic effects of drugs (especially pharmaceutical drugs). The effects can include those manifested within animals (including humans), microorganisms, or comb ...
, the study of how a drug affects an organism *
Phenyldichloroarsine Phenyldichloroarsine, also known by its wartime name phenyl Dick and its NATO abbreviation PD, is an organic arsenical vesicant and vomiting agent developed by Germany and France for use as a chemical warfare agent during World War I. The agent i ...
, a blister agent and vomiting agent *
Polydipsia Polydipsia is excessive thirst or excess drinking.Porth, C. M. (1990). ''Pathophysiology: Concepts of altered health states''. Philadelphia: J.B. Lippincott Company. The word derives , which is derived . Polydipsia is a nonspecific symptom in v ...
, excessive thirst *
Progressive disease Progressive disease or progressive illness is a disease or physical ailment whose course in most cases is the worsening, growth, or spread of the disease. This may happen until death, serious debility, or organ failure occurs. Some progressive di ...
, a disease that continues to worsen and often has no proven total cure *
Psychotic depression Psychotic depression, also known as depressive psychosis, is a major depressive episode that is accompanied by psychotic symptoms.Hales E and Yudofsky JA, eds, The American Psychiatric Press Textbook of Psychiatry, Washington, DC: American Psych ...
, a major depressive episode that is accompanied by psychotic symptoms *
Pupillary distance Pupillary distance (PD), more correctly known as interpupillary distance (IPD) is the distance in millimeters between the centers of each pupil. Interpupillary Distance Classifications Distance PD is the separation between the visual axes of the ...
, in optometry


Computing

*
pandas (software) Pandas (styled as pandas) is a software library written for the Python programming language for data manipulation and analysis. In particular, it offers data structures and operations for manipulating numerical tables and time series. It is ...
, function package for statistical analysis in the Python programming language *
Pentium D Pentium D is a range of desktop 64-bit x86-64 processors based on the NetBurst microarchitecture, which is the Multi-core processor, dual-core variant of the Pentium 4 manufactured by Intel. Each CPU comprised two cores. The brand's first process ...
, a dual-core variant of the Pentium 4 processor *
Perfect Dark (P2P) is a peer-to-peer file-sharing (P2P) application from Japan designed for use with Microsoft Windows. It was launched in 2006. Its author is known by the pseudonym . Perfect Dark was developed with the intention for it to be the successor to bot ...
, a Japanese peer-to-peer file-sharing (P2P) application designed for use with Microsoft Windows * Phase-change Dual, an optical media format *
Pure Data Pure Data (Pd) is a visual programming language developed by Miller Puckette in the 1990s for creating interactive computer music and multimedia works. While Puckette is the main author of the program, Pd is an open-source software, open-source ...
, a graphical audio-processing language * USB PD (USB Power Delivery), an extension of the USB standard


Physics

*
Photodiode A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical current when it absorbs photons. This can be used for detection and me ...
, a semiconductor device that converts light into current *
Potential difference Voltage, also known as (electrical) potential difference, electric pressure, or electric tension, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge ...
, or voltage *
Partial discharge In electrical engineering, partial discharge (PD) is a localized dielectric breakdown (DB) (which does not completely bridge the space between the two conductors) of a small portion of a solid or fluid electrical insulation (EI) system under hi ...
, an undesirable discharge phenomenon in high voltage dielectrics


Other uses in science and technology

* PD resistor, a pull-down resistor * Pd test, the outcome of using a drop of para-phenylenediamine (also abbr. "Pd") to identify lichens *
Palladium Palladium is a chemical element; it has symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1802 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas (formally 2 Pallas), ...
, symbol Pd, a chemical element * Photodisinfection, an alternative name for Antimicrobial Photodynamic Therapy *
Point-defence Point defence (or point defense; see spelling differences) is the defence of a single object or a limited area, e.g. a ship, building or an airfield, now usually against air attacks and guided missiles. Point defence weapons have a smaller range in ...
, a category of weapons *
Axiom of projective determinacy In mathematical logic, projective determinacy is the special case of the axiom of determinacy applying only to projective sets. The axiom of projective determinacy, abbreviated PD, states that for any two-player infinite game of perfect information ...
, in mathematical logic * Pumpe Düse, a Volkswagen Group name for Unit Injector diesel engine technology


Other uses

* The NYSE ticker symbol of
PagerDuty PagerDuty, Inc. is an American cloud computing company specializing in a SaaS incident management platform for IT operations departments. PagerDuty is headquartered in San Francisco with offices in Toronto, Atlanta, London, Lisbon, Tokyo, and Sy ...
* Padang railway station, West Sumatra, Indonesia (station code) *
Full stop The full stop ( Commonwealth English), period (North American English), or full point is a punctuation mark used for several purposes, most often to mark the end of a declarative sentence (as distinguished from a question or exclamation). A ...
(or period, in American English), used in coded military communications *
Personal development Personal development or self-improvement consists of activities that develops a person's capabilities and potential, enhance quality of life, and facilitate the realization of dreams and aspirations. Personal development may take place over the ...
, as used in the self-help and personal growth requiring fields * ''peu difficile'', in mountaineering, "little difficult" climbing grade International French adjectival system


See also

* '' PD-50'', a 1979 currently non-floating floating dry dock made in Sweden *
PD Draw The PD Draw is a partially dismantled railroad bridge on the Passaic River between Newark, New Jersey, Newark and Kearny, New Jersey, Kearny in the US state of New Jersey. It was built as part of Central Railroad of New Jersey line known as the ...
, a bridge over the Passaic River, New Jersey, US *
PD-1 Programmed cell death protein 1 (PD-1), (CD279 cluster of differentiation 279). PD-1 is a protein encoded in humans by the ''PDCD1'' gene. PD-1 is a cell surface receptor on T cells and B cells that has a role in regulating the immune system's re ...
, a cell surface receptor protein * ''pd'', the nickname of Brent Scott, the founder of the website
Insex Intersec Interactive Inc. is an American pornographic film studio. It is best known for Insex, a pornographic website focusing on BDSM and female submissives, founded in 1997. Until 2005 it was one of the biggest and most extreme of its kind o ...
* Pee Dee *
Pound (mass) The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is leg ...
* Pulldown (disambiguation) {{disambiguation, geo