PSD may refer to:

Educational bodies

Poudre School District The Poudre School District (R-1) is a preK–12 public school district in Larimer County in northern Colorado. The district operates and manages the public schools in the city of Fort Collins, as well as in the towns of Wellington, Timnath, p ...

, a school district in Larimer County, Colorado

Government and military

Payment Services Directive The Revised Payment Services Directive (PSD2, Directive (EU) 2015/2366, which replaced the Payment Services Directive (PSD), Directive 2007/64/EC) is an EU Directive, administered by the European Commission (Directorate General Internal Market) t ...

, EU regulation for payment services * Pesticides Safety Directorate, UK * Presidential Study Directive, a kind of

national security directive National security directives are presidential directives issued for the National Security Council (NSC). Starting with Harry Truman, every president since the founding of the National Security Council in 1947 has issued national security directi ...

from the Obama presidency * Prevention of Significant Deterioration (PSD) permit, under the

Clean Air Act (United States) The Clean Air Act (CAA) is the United States' primary federal air quality law, intended to reduce and control air pollution nationwide. Initially enacted in 1963 and amended many times since, it is one of the United States' first and most in ...

* Protective Services Detail, Personal Security Detachment, or Personal Security Detail; US military

security detail A security detail, often known as a PSD (protective services detail, personal security detachment, personal security detail) or PPD (personal protection detail), is a protective team assigned to protect the personal security of an individual or ...

Language

* Pennsylvania Sumerian Dictionary, lexicography project for the ancient language isolate *

Plains Indian Sign Language Plains Indian Sign Language (PISL), also known as Hand Talk, Plains Sign Talk, Plains Sign Language, or First Nation Sign Language, is an endangered sign language common to the majority of Indigenous nations of North America, notably those of ...

(ISO 639-3 code: psd) * Proto-South Dravidian, unattested language of south India

Political parties

Africa

* Social Democratic Party (Angola), a political party of Angola *

Social Democratic Party (Benin) The Social Democratic Party () is a political party in Benin. The PSD was founded in 1990. Running together with the National Union for Solidarity and Progress (UNSP) in the Beninese parliamentary election, 1991, February 1991 parliamentary ele ...

, a political party of Benin * Social Democratic Party of Madagascar, a political party of Madagascar *

Social Democratic Party (Rwanda) The Social Democratic Party (; , ) is a centre-left social democratic political party in Rwanda. The party is seen as somewhat supportive of the Paul Kagame government. History The party was established on 1 July 1991 by Félicien Gatabazi and Fr ...

, a political party of Rwanda *

Socialist Destourian Party The Socialist Destourian Party ( ' ; ; ) was the ruling political party of Tunisia from 1964 to 1988. Bahi Ladgham was the first Prime Minister from the party and Hédi Baccouche was the last. It was founded on 22 October 1964 and disbanded on ...

, former name (to 1988) of the ruling party in Tunisia, currently called Constitutional Democratic Rally

Americas

Parti social démocratique du Québec Parti may refer to: *Parti (service), an online video platform, web hosting, livestreaming, and cloud services business. *Parti (surname), a Hungarian surname, and a list of people with the name * ''Parti'' (architecture), the organizing concepts b ...

, a former provincial political party in Canada * Democratic Socialist Party (Argentina), a defunct political party of Argentina *

Social Democratic Party (Brazil, 1945–65) The name Social Democratic Party or Social Democrats has been used by many political parties in various countries around the world. Such parties are most commonly aligned to social democracy as their political ideology. Active parties Form ...

, a defunct political party of Brazil *

Social Democratic Party (Brazil, 2011) The Social Democratic Party (, PSD) is a political party in Brazil led by Gilberto Kassab and uniting dissidents from various political parties, especially the Democrats, Brazilian Social Democracy Party and Party of National Mobilization. T ...

, a current political party of Brazil *

Social Democratic Party (El Salvador) The Social Democratic Party () was a social-democratic party in El Salvador El Salvador, officially the Republic of El Salvador, is a country in Central America. It is bordered on the northeast by Honduras, on the northwest by Guatemala, and ...

, a political party of El Salvador *

Social Democratic Party (Mexico) The Social Democratic Party or Social Democratic and Peasant Alternative Party (, PSD, ''Partido Alternativa Socialdemócrata y Campesina, Alternativa'') was a left-wing Mexican political party between 2005 and 2009. It defined itself as a New L ...

, a defunct political party of Mexico *

Social Democratic Party (Nicaragua) The Social Democratic Party (, abbreviated PSD) is a center-left Nicaraguan political party that split from Conservatives in 1979. The party sought affiliation to the Socialist International The Socialist International (SI) is a political int ...

, a political party of Nicaragua

Europe

* Civil Movement "People's Self-Defense", a defunct political movement in Ukraine which was part of the Our Ukraine–People's Self-Defense Bloc electoral alliance *

Party of Socialists and Democrats The Party of Socialists and Democrats (, PSD) is a social democracy, social-democratic and democratic socialist List of political parties in San Marino, political party in San Marino. It is a member of the Socialist International, and observer m ...

, a major political party of San Marino *

Social Democratic Party of Albania The Social Democratic Party of Albania (, PSD or PSDSH) is a minor social democratic political party in Albania. Its founder is Skënder Gjinushi, a former Minister of Education (1987–1991) and Speaker of Parliament (1997–2001). Histo ...

, a minor political party of Albania *

Social Democratic Party (France) The Social Democratic Party (, , PSD) was a Centrism, centrist list of political parties in France, political party in France. Originally named Democratic Socialist Movement of France (''Mouvement démocrate socialiste de France'', MDSF), the pa ...

, a defunct political party of France *

Social Democratic Party (Moldova) The Social Democratic Party (, PSD) is an extra-parliamentary List of political parties in Moldova, political party in Moldova currently led by Victor Șelin. History In the autumn of 1989, the materials of the 18th Stockholm Congress of Sociali ...

, a political party of Moldova *

Social Democratic Party (Portugal) The Social Democratic Party ( , PSD) is a liberal-conservative political party in Portugal that is currently the country's ruling party. Commonly known by its colloquial initials PSD, on ballot papers its initials appear as its official form ...

, a major political party of Portugal *

Social Democratic Party (Romania) The Social Democratic Party (, PSD) is the largest political party in Romania. It is also the largest Social democracy, social democratic List of political parties in Romania, political party in the country. It was founded by Ion Iliescu, Rom ...

, a major political party of Romania *

Social Democratic Party (Spain) The Social Democratic Party (Partido Social Demócrata, PSD) was a minor political party based in the Valencian Community, Spain. It gained relevancy in the local and regional elections of May 27, 2007 in the Valencian Community, in the Community ...

, a defunct political party of Spain

Science and engineering

Computing

* Personal or

portable storage device A portable storage device (PSD) is a compact plug-and-play mass storage device designed to hold a large volume of digital data of ''any'' kind. This is slightly different from a portable media player, which is designed to only store music and vid ...

* .psd, a Photoshop document file extension * Professional Scrum Developer, a course leading to certification for

Scrum (development) Scrum is an agile team collaboration framework commonly used in software development and other industries. Scrum prescribes for teams to break work into goals to be completed within time-boxed iterations, called ''sprints''. Each sprint ...

Power spectral density In signal processing, the power spectrum S_(f) of a continuous time signal x(t) describes the distribution of power into frequency components f composing that signal. According to Fourier analysis, any physical signal can be decomposed into ...

, the distribution of power per unit time into frequency components composing that signal.

Medicine

Protein S deficiency Protein S deficiency is a disorder associated with increased risk of venous thrombosis. Protein S, a vitamin K-dependent physiological anticoagulant, acts as a nonenzymatic cofactor to activate protein C in the degradation of factor Va and factor V ...

* Post-stroke depression * Postsynaptic density, a specialization of the cytoskeleton at the synaptic junction *

Psychiatric service dog A psychiatric assistance dog or psychiatric service dog is a sub-category of assistance dog trained to assist their handler with a psychiatric disability or a mental disability, such as obsessive-compulsive disorder, post-traumatic stress disord ...

Other uses in science and engineering

Particle size distribution In the physical sciences, a particle (or corpuscle in older texts) is a small localized object which can be described by several physical or chemical properties, such as volume, density, or mass. They vary greatly in size or quantity, from s ...

, in granular materials *

Platform screen doors Platform screen doors (PSDs), also known as platform edge doors (PEDs), are used at some train, rapid transit and people mover stations to separate the platform from train tracks, as well as on some bus rapid transit, tram and light rail ...

, in railway platforms * Position sensitive device or detector, a two-dimensional photodetector * Positive semidefinite (disambiguation) *

, distribution of power of a signal * Program Service Data, data displayed on HD radio receiver

Other uses

PSD (rapper) Steve Davison, better known as PSD, PSD Tha Drivah or Stevie Dee, is a rapper and producer from Vallejo, California Vallejo ( ; ) is a city in Solano County, California, United States, and the second largest city in the North Bay (San Franc ...

, a Californian rapper and hip-hop producer * Port Said Airport, Egypt (IATA code PSD) *

Private Sector Development Private sector development (PSD) is a term in the international development industry to refer to a range of strategies for promoting economic growth and reducing poverty in developing countries by building private enterprises. This could be through ...

, term used in international development * PSD Bank, German banking group * Patricia Street Deli, a famous sandwich and soup restaurant located in the tourist town of Jasper, Alberta, Canada * FK PSD, a handgun chambered mainly in 7.5 FK but also comes with barrels for

10mm Auto The 10mm Auto (also known as the 10×25mm, official C.I.P. nomenclature: 10 mm Auto, official SAAMI nomenclature: 10mm Automatic) is a powerful and versatile semi-automatic pistol cartridge introduced in 1983. Its design was adopted and l ...

and 9x19mm {{disambiguation