PSD may refer to:
Government and military Payment Services Directive, EU regulation for payment services Pesticides Safety Directorate, UK Prabowo Subianto Djojohadikusumo, president of Indonesia Presidential Study Directive, a kind of national security directive from the Obama presidency Prevention of Significant Deterioration (PSD) permit, under the Clean Air Act (United States) Protective Services Detail, Personal Security Detachment, or Personal Security Detail; US military security details Armoured Division (Finland) ()
Language Pennsylvania Sumerian Dictionary, lexicography project for the ancient language isolate Plains Indian Sign Language, historic North American lingua franca (ISO 639-3: psd) Proto-South Dravidian, unattested language of south India
Places Philippine School for the Deaf, a school in Pasay, Philippines Port Said Airport, Egypt (IATA: PSD) Poudre School District, Colorado, United States
Political parties Africa Social Democratic Party (Angola), a political party of Angola Social Democratic Party (Benin), 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), a defunct political party of Argentina Social Democratic Party (Brazil, 1945–65), a defunct political party of Brazil Social Democratic Party (Brazil, 1987)–2003), 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), 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, a minor political party of Albania Social Democratic Party (France), a defunct political party of France Social Democratic Party (Moldova), a political party of Moldova Social Democratic Party (Portugal), a major political party of Portugal Social Democratic Party (Romania), a major political party of Romania Social Democratic Party (Spain), 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) Power spectral density, the distribution of power per unit time into frequency components composing that signal.
Medicine Protein S deficiency Post-stroke depression Postsynaptic density, a specialization of the cytoskeleton at the synaptic junction Psychiatric service dog
Other uses in science and engineering Particle size distribution, in granular materials Platform screen doors, in railway platforms Position sensitive device 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 Private Sector Development, term used in international development PSD Bank, German banking group FK PSD, a handgun