PSD may refer to:

Educational bodies

Pennsylvania School for the Deaf The Pennsylvania School for the Deaf is the third-oldest school of its kind in the United States. Its founder, David G. Seixas (1788–1864), was a Philadelphia crockery maker-dealer who became concerned with the plight of impoverished deaf childr ...

, 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, Lovela ...

, a school district in Larimer County, Colorado

Government and military

* Payment Services Directive, 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 directive ...

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 infl ...

* 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 (ISO 639-3 code: psd) * Proto-South Dravidian, 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 Luanda () is the Capital (political), capital and largest city in Angola. It is Angola's primary port, and its major ...

, 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), a political party of Rwanda * Socialist Destourian Party, former name (to 1988) of the ruling party in Tunisia, currently called Constitutional Democratic Rally

Americas

* Parti social démocratique du Québec, 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 acti ...

, a defunct political party of Argentina * Social Democratic Party (Brazil, 1945–65), a defunct political party of Brazil * Social Democratic Party (Brazil, 2011), a current political party of Brazil * Social Democratic Party (El Salvador), 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), 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, 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 party, minor social democracy, social-democratic list of political parties in Albania, political party in Albania. Its founder is Skënd ...

, 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 i ...

, 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 Inte ...

, 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), 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 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 vi ...

* .psd, a Photoshop document file extension * Professional Scrum Developer, a course leading to certification for Scrum (development) * Power spectral density, the distribution of power per unit time into frequency components composing that signal.

Medicine

* Protein S deficiency *

Post-stroke depression Post-stroke depression (PSD) is considered the most frequent and important neuropsychiatric consequence of stroke. Approximately one-third of stroke survivors experience major depression. Moreover, this condition can have an adverse effect on cogn ...

* 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, obsessive-compulsive disord ...

Other uses in science and engineering

* Particle size distribution, 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 A position sensitive device and/or position sensitive detector (PSD) is an optical position sensor (OPS) that can measure a position of a light spot in one or two-dimensions on a sensor surface. Principles PSDs can be divided into two classes whi ...

or detector, a two-dimensional photodetector * Positive semidefinite (disambiguation) * Power spectral density, distribution of power of a signal * Program Service Data, data displayed on HD radio receiver

Other uses

* PSD (rapper), a Californian rapper and hip-hop producer *

Port Said Airport Port Said Airport serves the city of Port Said, Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge ...

, 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 throug ...

, term used in international development *

PSD Bank The PSD Bankengruppe is a German cooperative banking group consisting of 14 autonomous and independent financial institutions. The business model of the PSD banks is a combination of regional direct and affiliated bank. It provides retail bankin ...

, German banking group {{disambiguation