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 Philippine School Doha ( ar, المدرسة الفلبينية الدوحة), also known as PSD for short, is a learning institution in Qatar providing basic education for the Filipino. The school has undergone numerous processes to gain its DepEd ...

, 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 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) to ...

, 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 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 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 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 Social Democratic Party of Madagascar (french: Parti Social Démocrate de Madagascar et des Comores, PSD) is a political party in Madagascar. History The party was founded in 1956 in Majunga district as the Social Democratic Party of Madagascar a ...

, 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 Félici ...

, 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 an ...

, 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 acti ...

, 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 For ...

, 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, Brazilian Social Democracy Party and Prog ...

, a current political party of Brazil *

Social Democratic Party (El Salvador) The Social Democratic Party () is a social-democratic party in El Salvador. A Social Democratic Party participated in the 1945 presidential elections, with its candidate, Osmín Aguirre y Salinas, finishing second (albeit with only 0.2% of the vo ...

, 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" Civil Movement "People's Self-Defense" ( uk, Громадянський рух «Народна самооборона») is a political movement in Ukraine, headed by a former SPU member Yuriy Lutsenko. History Yuriy Lutsenko created People's S ...

, 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 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) 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 seco ...

, 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) 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, o ...

, 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 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. Sig ...

, 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) *

, 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, US, who is closely associated with the late Mac Dre Andre Louis Hicks (July 5, 1970 – November 1, 2004), known by his stag ...

, 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