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PP, pp or Pp may refer to:


Arts and entertainment

* ''Pianissimo'', a music term meaning ''very quiet'', from
musical dynamics In music, the dynamics of a piece is the variation in loudness between notes or phrases. Dynamics are indicated by specific musical notation, often in some detail. However, dynamics markings still require interpretation by the performer dependin ...
* Production code for the 1967–1968 ''Doctor Who'' serial ''
The Enemy of the World ''The Enemy of the World'' is the fourth serial of the fifth season of the British science fiction television series ''Doctor Who'', which originally aired in six weekly parts from 23 December 1967 to 27 January 1968. The serial is set in Aus ...
'' *
Police Procedural The police show, or police crime drama, is a subgenre of procedural drama and detective fiction that emphasizes the investigative procedure of a police officer or department as the protagonist(s), as contrasted with other genres that focus on eith ...
- a subgenre of procedural drama and detective fiction


Businesses and organisations


Political parties

*
Patriotic Party (Guatemala) The Patriotic Party ( es, Partido Patriota, PP) was a conservative political party in Guatemala. It was founded on 24 February 2001 by retired army officer Otto Pérez Molina. Strongly compromised by corruption cases, the party fell from 36% sup ...
*
People's Party (Spain) The People's Party ( es, Partido Popular ; known mostly by its acronym, PP ) is a conservative and Christian-democratic political party in Spain. The People's Party was a 1989 re-foundation of People's Alliance (AP), a party led by former mi ...
(''Partido Popular'') *
Pirate Party Pirate Party is a label adopted by Political party, political parties around the world. Pirate parties support Civil and political rights, civil rights, direct democracy (including e-democracy) or alternatively Participatory democracy, partici ...
(Global) * Progressistas (Brazil) (''Progressistas'') *
Progressive Party (Iceland) The Progressive Party ( is, Framsóknarflokkurinn, FSF) is an agrarian political party in Iceland. For most of its history, the Progressive Party has governed with the Independence Party. Since 30 November 2017, the party has been a coalition ...
* People's Partnership (Trinidad and Tobago) *
We Continue the Change We Continue the Change ( bg, Продължаваме промяната, Prodalzhavame promyanata; PP), sometimes translated as Change Continues, is a Centrism, centrist, anti-corruption List of political parties in Bulgaria, political party and ...
(Bulgaria) ("Prodalzhavame promyanata")


Other businesses and organizations

* Pancasila Youth (''Pemuda Pancasila''), an Indonesian paramilitary organization * PediaPress, a German software company *
Planned Parenthood The Planned Parenthood Federation of America, Inc. (PPFA), or simply Planned Parenthood, is a nonprofit organization that provides reproductive health care in the United States and globally. It is a tax-exempt corporation under Internal Reve ...
, a reproductive health organization *
Philipp Plein Philipp is both a surname and a given name. Notable people with the name include: "Philipp" has also been a shortened version of Philippson, a German surname especially prevalent amongst German Jews and Dutch Jews. Surname * Adolf Philipp (1864 ...
, logo *
PayPal PayPal Holdings, Inc. is an American multinational financial technology company operating an online payments system in the majority of countries that support online money transfers, and serves as an electronic alternative to traditional paper ...
, an online payments company


Religion

* pp, ''Papa Pontifex'', post-nominal used by
pope The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Cathol ...
s


Science, technology, and mathematics


Biology and medicine

*
Vitamin PP Niacinamide or Nicotinamide (NAM) is a form of vitamin B3 found in food and used as a dietary supplement and medication. As a supplement, it is used by mouth to prevent and treat pellagra (niacin deficiency). While nicotinic acid (niacin) may b ...
or nicotinamide *
Paliperidone palmitate Paliperidone palmitate (PP), sold under the brand name Invega Sustenna among others, is an atypical antipsychotic which is used in the treatment of schizophrenia and schizoaffective disorder. It is an antipsychotic ester – specifically the pal ...
, an antipsychotic medication *
Pancreatic polypeptide Pancreatic polypeptide (PP) is a polypeptide secreted by PP cells in the endocrine pancreas. It regulates pancreatic secretion activities, and also impacts liver glycogen storage and gastrointestinal secretion. Its secretion may be impacted by ...
, a polypeptide secreted by PP cells **
PP cell Pancreatic polypeptide cells (PP cells), or formerly as gamma cells (γ-cells), or F cells, are cells in the pancreatic islets (Islets of Langerhans) of the pancreas. Their main role is to help synthesize and regulate the release of pancreatic pol ...
or pancreatic polypeptide cell *
pro parte The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnae ...
, abbreviated p.p., for a type of synonymy in taxonomy


Computing

*
PP (complexity) In complexity theory, PP is the class of decision problems solvable by a probabilistic Turing machine in polynomial time, with an error probability of less than 1/2 for all instances. The abbreviation PP refers to probabilistic polynomial time. T ...
, a probabilistic polynomial time complexity class *
PP-format The PP-format (Post Processing Format) is a proprietary file format for meteorological data developed by the Met Office, the United Kingdom's national weather service. Simulations of the weather are performed by the Met Office's Unified Model, whi ...
(Post Processing Format), a file format for meteorological data * PP X.400, an e-mail protocol *
Plug and play In computing, a plug and play (PnP) device or computer bus is one with a specification that facilitates the recognition of a hardware component in a system without the need for physical device configuration or user intervention in resolving resou ...
(P&P), a property of a peripheral device *
Microsoft PowerPoint Microsoft PowerPoint is a presentation program, created by Robert Gaskins and Dennis Austin at a software company named Forethought, Inc. It was released on April 20, 1987, initially for Macintosh computers only. Microsoft acquired PowerPoi ...
, a presentation program


Mathematics

*
P–P plot In statistics, a P–P plot (probability–probability plot or percent–percent plot or P value plot) is a probability plot for assessing how closely two data sets agree, or for assessing how closely a dataset fits a particular model. It works b ...
, a probability plot, in statistics *
Percentage point A percentage point or percent point is the unit (measurement), unit for the Difference (mathematics), arithmetic difference between two percentages. For example, moving up from 40 percent to 44 percent is an increase of 4 percentage points, but a ...
, in business writing and statistics *
Process performance index In process improvement efforts, the process performance index is an estimate of the process capability of a process during its initial set-up, ''before'' it has been brought into a state of statistical control. Formally, if the upper and lower spe ...
(Pp) * ''Presque partout'' (
almost everywhere In measure theory (a branch of mathematical analysis), a property holds almost everywhere if, in a technical sense, the set for which the property holds takes up nearly all possibilities. The notion of "almost everywhere" is a companion notion to ...
), in measure theory and analysis. (This is always lower case -- 'pp'. In English 'ae' is often used instead.)


Other uses in science and technology

*
Paris Principles (cataloging) The Paris Principles (PP) also known as the Statement of Principles defined the theoretical foundation for the creation of bibliographical cataloging rules for libraries. They were specified and agreed upon in October 1961 at the ''Conference on C ...
, a theoretical foundation for the creation of bibliographical cataloging rules for libraries *
Walther PP The Walther PP (german: Polizeipistole, or police pistol) series pistols are blowback-operated semi-automatic pistols, developed by the German arms manufacturer Carl Walther GmbH Sportwaffen. It features an exposed hammer, a traditional double-ac ...
, a pistol *
Length between perpendiculars Length between perpendiculars (often abbreviated as p/p, p.p., pp, LPP, LBP or Length BPP) is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the ster ...
("pp" or "p/p"), the length of a ship * Peak to peak (p–p)
amplitude The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of amplit ...
of a signal *
Polypropylene Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and ...
, a common plastic polymer * Proton–proton chain reaction, in nuclear physics


Other uses

* p.p., ''
Per procurationem Procuration () is the action of taking care of, hence management, stewardship, agency. The word is applied to the authority or power delegated to a procurator, or agent, as well as to the exercise of such authority expressed frequently by procurati ...
'', when signing on behalf of another * pp, pages (of a book), an example of the convention of doubling the letters in the acronym to indicate plural words, see Acronym and initialism#Representing plurals and possessives * Percy Pig, a British brand of pig-shaped fruit-flavoured confectionery products


See also

* Peepee (disambiguation) {{Disambiguation