PR, P.R., Pr, pr, or Pr. may refer to:

Arts, entertainment, and media

* ''P.R.'' (TV series), a Canadian television sitcom * '' Partisan Review'', a former political and literary journal * ''

Perry Rhodan ''Perry Rhodan'' is a West Germany, West German/Germany, German space opera franchise, named after its hero. It commenced in 1961 and has been ongoing for decades, written by an ever-changing team of authors. Having sold approximately two billi ...

'', German science fiction series * ''

Power Rangers ''Power Rangers'' is an entertainment and merchandising franchise built around a live-action superhero television series, based on the Japanese tokusatsu franchise ''Super Sentai''. Produced first by Saban Entertainment, second by BVS Entert ...

'', an American television franchise based on ''Super Sentai''

Places

PR postcode area The PR postcode area, also known as the Preston postcode area, is a group of eleven postcode districts in North West England, within four post towns. These cover south-west Lancashire (including Preston, Chorley and Leyland) and north Merseysid ...

, UK, including Preston and Lancashire *

Paraná (state) Paraná () is one of the 26 states of Brazil, in the south of the country, bordered on the north by São Paulo state, on the east by the Atlantic Ocean, on the south by Santa Catarina state and the province of Misiones, Argentina, and on the west ...

, Brazil (ISO 3166-2:BR) *

Parma Parma (; egl, Pärma, ) is a city in the northern Italian region of Emilia-Romagna known for its architecture, Giuseppe Verdi, music, art, prosciutto (ham), Parmigiano-Reggiano, cheese and surrounding countryside. With a population of 198,292 ...

, Italy (ISO 3166-2:IT) *

Puerto Rico Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated ...

, ISO 3166 code PR

Politics

Pakatan Rakyat The People's Alliance ( ms, Pakatan Rakyat; abbrev: PR) was an informal Malaysian political coalition and successor to Barisan Alternatif (BA). The political coalition was formed by the People's Justice Party (PKR), Democratic Action Party (DAP ...

, an informal Malaysian political coalition * Party of Labour (''Partija rada''), a political party in Serbia *

Proportional representation Proportional representation (PR) refers to a type of electoral system under which subgroups of an electorate are reflected proportionately in the elected body. The concept applies mainly to geographical (e.g. states, regions) and political divis ...

, a property of some voting systems *

Republican Party of Albania The Republican Party of Albania (, PR or PRSH ) is a national-conservative political party in Albania. It currently holds 3 of the 140 seats in the Parliament of Albania, in alliance with the Democratic Party of Albania. History The party was fou ...

, a political party in Albania

Public relations

Public relations Public relations (PR) is the practice of managing and disseminating information from an individual or an organization (such as a business, government agency, or a nonprofit organization) to the public in order to influence their perception. P ...

, the professional maintenance of a favorable public image by an organisation or person * Press release, a prepared statement given to the news media as a public-relations tool

Religion

Pastor A pastor (abbreviated as "Pr" or "Ptr" , or "Ps" ) is the leader of a Christian congregation who also gives advice and counsel to people from the community or congregation. In Lutheranism, Catholicism, Eastern Orthodoxy, Oriental Orthodoxy and ...

, an ordained leader of a Christian congregation * Permanens Rector, or Permanent Rector, of a parish

Science, technology, and mathematics

Biology and medicine

* Partial Response, a component of Response Evaluation Criteria in Solid Tumors *

Pathogenesis-related Pathogenesis-related (PR) proteins are proteins produced in plants in the event of a pathogen attack. They are induced as part of systemic acquired resistance. Infections activate genes that produce PR proteins. Some of these proteins are antimicro ...

proteins, produced by plants under pathogen attack *

Penicillium roqueforti ''Penicillium roqueforti'' is a common saprotrophic fungus in the genus ''Penicillium''. Widespread in nature, it can be isolated from soil, decaying organic matter, and plants. The major industrial use of this fungus is the production of blue ...

* '' Per rectum'', meaning "administered rectally" *Pigment Red (e.g., Para red,

Pigment Red 190 Pigment Red 190 (C.I. 71140), also called Vat Red 29, is a synthetic organic compound that is used both as a pigment and as a vat dye. Although structurally a derivative of perylene, it is produced from acenaphthene.K. Hunger. W. Herbst "Pigments, ...

) *

PR interval In electrocardiography, the PR interval is the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization) ...

, a measurement used in cardiology *

PR-104 PR-104 is a drug from the class of hypoxia-activated prodrugs (HAPs), which is being researched as a potential anti-cancer therapeutic agent. It is a phosphate ester “pre-prodrug” that is rapidly converted to the HAP PR-104A in the body. PR-10 ...

Progesterone receptor The progesterone receptor (PR), also known as NR3C3 or nuclear receptor subfamily 3, group C, member 3, is a protein found inside cells. It is activated by the steroid hormone progesterone. In humans, PR is encoded by a single ''PGR'' gene resid ...

, a protein

Computing

PR (complexity) PR is the complexity class of all primitive recursive functions—or, equivalently, the set of all formal languages that can be decided in time bounded by such a function. This includes addition, multiplication, exponentiation, tetration, etc. The ...

, a complexity class * pr (Unix), Unix command to paginate or columnate files for printing *

Adobe Premiere Pro Adobe Premiere Pro is a timeline-based and non-linear video editing software application (NLE) developed by Adobe Inc. and published as part of the Adobe Creative Cloud licensing program. First launched in 2003, Adobe Premiere Pro is a succes ...

, software which uses "Pr" as its icon abbreviation * Pagerank, a Google technology *

Performance Rating The PR (Performance Rating, P-rating) system was a figure of merit developed by AMD, Cyrix, IBM Microelectronics and SGS-Thomson in the mid-1990s (Cyrix announced it in February 1996) as a method of comparing their x86 processors to those of ri ...

, a computing term by AMD *

Project Reality ''Project Reality'' is a series of combined arms tactical first-person shooter video game modifications which aim to create a realistic combat environment where the core gameplay encourages teamwork and coordination. The original version, ''Proj ...

, series of video games * Pull request, part of distributed version control * Part of the YPbPr standard

Mathematics

, a complexity class * Pr(''E''), also P(''E''), the probability of an

event Event may refer to: Gatherings of people * Ceremony, an event of ritual significance, performed on a special occasion * Convention (meeting), a gathering of individuals engaged in some common interest * Event management, the organization of eve ...

''E'' *

Positive-real function Positive-real functions, often abbreviated to PR function or PRF, are a kind of mathematical function that first arose in electrical network synthesis. They are complex functions, ''Z''(''s''), of a complex variable, ''s''. A rational function is ...

, in mathematics *

, a property of some voting systems

Other uses in science and technology

* Praseodymium, symbol Pr, a chemical element *

Prandtl number The Prandtl number (Pr) or Prandtl group is a dimensionless number, named after the German physicist Ludwig Prandtl, defined as the ratio of momentum diffusivity to thermal diffusivity. The Prandtl number is given as: : \mathrm = \frac = \frac ...

, in physics and engineering, typically denoted ''Pr'' * Propyl radicals or groups, denoted ''Pr'' in organic chemistry

Sports

Personal record (sport) A personal record or personal best (abbreviated to PR or PB) is an individual's best performance in a given sporting discipline. It is most commonly found in athletic sports, such as track and field, other forms of running, swimming and weightliftin ...

, an individual's personal record in a particular event *

Pinch runner In baseball, a pinch runner is a player substituted for the specific purpose of replacing another player on base. The pinch runner may be faster or otherwise more skilled at base-running than the player for whom the pinch runner has been sub ...

, in baseball *

Protected ranking This page is a glossary of tennis terminology. A * Ace: Serve where the tennis ball lands inside the '' service box'' and is not touched by the receiver; thus, a shot that is both a serve and a winner is an ace. Aces are usually powerful and ge ...

, a method of ranking tennis players coming back from injury *

Punt returner A return specialist or kick returner is a player on the special teams unit of a gridiron football team who specializes in returning punts and kickoffs. There are few players who are exclusively return specialists; most also play another position ...

, a position in American football

Transportation

Pakistan Railways Pakistan Railways ( ur, ) is the national, state-owned railway company of Pakistan. Founded in 1861 and headquartered in Lahore, it owns of track across Pakistan, stretching from Torkham to Karachi, offering both freight and passenger servi ...

(reporting mark PR) * Park and ride, a type of car park with public transport connections * Philippine Airlines (IATA airline designation PR) *''

Poste restante ''Poste restante'' (, "remainder post"), also known as general delivery in North American English, is a service where the post office holds the mail until the recipient calls for it. It is a common destination for mail for people who are visiting ...

'', mail held for collection

Other uses

Pakistan Rangers The Pakistan Rangers ( ur, ) are a paramilitary federal law enforcement organization in Pakistan, operating under the authority of the Interior Secretary of Pakistan. Their primary purpose is to secure and defend sites of significance in the ...

, a paramilitary force of Pakistan * Parachute rigger, a former U.S. Navy rank * Permanent residency * Princess Royal *

Professor Professor (commonly abbreviated as Prof.) is an Academy, academic rank at university, universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who pr ...