PSD may refer to:

Educational bodies

* Pennsylvania School for the Deaf, a Pre-K to 12th grade school for Deaf and Hard of Hearing students, located in the Germantown section of Philadelphia, Pennsylvania * Philippine School Doha, a Filipino school in Doha, Qatar *

Pontiac School District The School District of the City of Pontiac (or Pontiac School District, PSD) is a public school district headquartered in the Odell Nails Administration Building in Pontiac, Michigan, United States. The school district serves all of the city of ...

, a school district in Michigan, US *

Poudre School District The Poudre School District (R-1) is a K–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, Lovelan ...

, 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 The Pesticides Safety Directorate was an agency of the Department for Environment, Food and Rural Affairs (Defra). It was based in York, England, with about 200 scientific, policy and support staff and was responsible for the authorisation of ...

, 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 directiv ...

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 inf ...

* 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 The Pennsylvania Sumerian Dictionary (PSD) is a project to compile a comprehensive dictionary of the Sumerian language. It is run out of the University of Pennsylvania's Museum of Archaeology and Anthropology and funded by both private donors and ...

, lexicography project for the ancient language isolate *

Plains Indian Sign Language Plains Indian Sign Language (PISL), also known as Hand Talk, Plains Sign Talk, and First Nation Sign Language, is a trade language, formerly trade pidgin, that was once the lingua franca across what is now central Canada, the central and west ...

(ISO 639-3 code: psd) *

Proto-South Dravidian Proto-South Dravidian is the linguistic reconstruction of the common ancestor of the south Dravidian languages. Its descendants include Tamil language, Tamil, Kannada, Malayalam, Tulu language, Tulu, Badaga language, Badaga, Kodava language, Kodav ...

, unattested language of south India

Political parties

Africa

Social Democratic Party (Angola) The Social Democratic Party (''Partido Social-Democrata'') is a political party in Angola. The party was founded in Luanda on November 16, 1988. The party is led by Bengui Pedro João. Sources UNHCR.org: Social Democratic Party (Angola)
...

, a political party of Angola *

Social Democratic Party (Benin) The Social Democratic Party (french: Parti Social-Démocrate) 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 February 1991 parliamentary election, ...

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

Social Democratic Party (Rwanda) The Social Democratic Party (french: Parti Social Démocrate) is a centre-left social democratic political party in Rwanda. The party is seen as supportive of the Paul Kagame government. History The party was established on 1 July 1991 by Félic ...

, a political party of Rwanda *

Socialist Destourian Party The Socialist Destourian Party ( ar, الحزب الاشتراكي الدستوري ' ; french: Parti socialiste destourien) was the ruling political party of Tunisia from 1964 to 1988. Bahi Ladgham was the first Prime Minister from the party a ...

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

Americas

Parti social démocratique du Québec The Parti social démocratique du Québec (PSD; ) was the Quebec wing of the Co-operative Commonwealth Federation. It was founded in 1939 as the Fédération du Commonwealth Coopératif and was led by Romuald-Joseph Lamoureux in the 1944 general e ...

, a former provincial political party in Canada *

Democratic Socialist Party (Argentina) The Democratic Socialist Party ( es, Partido Socialista Democrático) was a political party in Argentina formed in 1959 as a division of the Socialist Party. The most important figure of the PSD was Alfredo Bravo, a teacher and civil rights act ...

, 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 Fo ...

, a defunct political party of Brazil *

Social Democratic Party (Brazil, 2011) The Social Democratic Party ( pt, Partido Social Democrático, PSD) is a political party in Brazil led by Gilberto Kassab and uniting dissidents from various political parties, especially the Democrats (Brazil), Democrats, Brazilian Social Democ ...

, a current political party of Brazil *

Social Democratic Party (El Salvador) The Social Democratic Party () is a social-democratic party in El Salvador El Salvador (; , meaning " The Saviour"), officially the Republic of El Salvador ( es, República de El Salvador), is a country in Central America. It is bordered on ...

, a political party of El Salvador *

Social Democratic Party (Mexico) The Social Democratic Party ( es, Partido Socialdemócrata, PSD) was a short-lived Mexican political party. History The party's first name was Social Democratic and Peasant Alternative Party (''Partido Alternativa Socialdemócrata y Campesina'') ...

, a defunct political party of Mexico *

Social Democratic Party (Nicaragua) The Social Democratic Party ( es, Partido Social Demócrata, abbreviated PSD) is a right-wing Nicaraguan political party that split from Conservatives in 1979. The party sought affiliation to the Socialist International, but its application was re ...

, 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 ( it, Partito dei Socialisti e dei Democratici, PSD) is a social-democratic and democratic socialist political party in San Marino. It is a member of the Socialist International, and observer member of the P ...

, a major political party of San Marino *

Social Democratic Party of Albania The Social Democratic Party of Albania ( sq, Partia Socialdemokrate e Shqipërisë, 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 Speak ...

, a minor political party of Albania *

Social Democratic Party (France) The Social Democratic Party (french: Parti social-démocrate, PSD) was a centrist political party in France. Originally named Democratic Socialist Movement of France (''Mouvement démocrate socialiste de France'', MDSF), the party was founded in ...

, a defunct political party of France *

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

, a political party of Moldova *

Social Democratic Party (Portugal) The Social Democratic Party ( pt, Partido Social Democrata, ; PSD) is a liberal-conservative political party in Portugal. Commonly known by its colloquial initials PSD, on ballot papers its initials appear as its official form PPD/PSD, with the ...

, a major political party of Portugal *

Social Democratic Party (Romania) The Social Democratic Party ( ro, Partidul Social Democrat, PSD) is the largest social democratic political party in Romania and also the largest overall political party in the country, aside from European Parliament level, where it is the sec ...

, a major political party of Romania *

Social Democratic Party (Spain) The Social Democratic Party (Partido Social Demócrata, PSD) was created following a split in the Social democratic union party on April 9, 2007 in Spain, in the Valencian Community, its ideology is social democratic. The aims of the PSD are to o ...

, a defunct political party of Spain

Science and engineering

Computing

* Personal or portable storage device * .psd, a Photoshop document file extension * Professional Scrum Developer, a course leading to certification for

Scrum (development) Scrum is a framework for project management with an initial emphasis on software development, although it has been used in other fields including research, sales, marketing and advanced technologies. It is designed for teams of ten or fewer me ...

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

, 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 ...

* Post-stroke depression *

Postsynaptic density The postsynaptic density (PSD) is a protein dense ''specialization'' attached to the postsynaptic membrane. PSDs were originally identified by electron microscopy as an electron-dense region at the membrane of a postsynaptic neuron. The PSD is in ...

, a specialization of the cytoskeleton at the synaptic junction

Other uses in science and engineering

Particle size distribution The particle-size distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size. Si ...

, 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 syste ...

, on railway platforms * Position sensitive device or detector, a two-dimensional photodetector *

Positive semidefinite (disambiguation) In mathematics, positive semidefinite may refer to: * Positive semidefinite function * Positive semidefinite matrix * Positive semidefinite quadratic form Positive is a property of positivity and may refer to: Mathematics and science * Positi ...

, distribution of power of a signal *

Program Service Data Program Associated Data (PAD) or Program Service Data (PSD) is the data displayed on many HD Radio and satellite radio Satellite radio is defined by the International Telecommunication Union (ITU)'s ITU Radio Regulations (RR) as a ''broadcastin ...

, 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, US, who is closely associated with the late Mac Dre. Career PSD tha Drivah first appeared on Mac Dre's 1996 compilation albu ...

, a Californian rapper and hip-hop producer *

Port Said Airport Port Said Airport serves the city of Port Said, Egypt, at the north end of the Suez Canal. In 2011, the airport served 36,962 passengers (-5.5% vs. 2010). Modernisation The airport underwent a modernisation program with a partial inauguration i ...

, 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 {{disambiguation