PDA may refer to:

Science and technology

* Parts departing aircraft, mid-air loss of screws, rivets, doors, etc. *

Patron-driven acquisition Patron-driven acquisition (PDA), also referred to as demand-driven acquisition (DDA), is a model of library collection development in which a library only purchases materials when it is clear that a patron wants them. In an ideal transaction, libr ...

, a mechanism for libraries to purchase books *

Personal digital assistant A personal digital assistant (PDA) is a multi-purpose mobile device which functions as a personal information manager. Following a boom in the 1990s and 2000s, PDAs were mostly displaced by the widespread adoption of more highly capable smar ...

, an early kind of mobile device *

Photodiode array A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical current when it absorbs photons. This can be used for detection and me ...

, a type of detector *

Pitch detection algorithm A pitch detection algorithm (PDA) is an algorithm designed to estimate the pitch or fundamental frequency of a quasiperiodic or oscillating signal, usually a digital recording of speech or a musical note or tone. This can be done in the time do ...

, to find the pitch of a signal *

Polydiacetylenes Polydiacetylenes (PDAs) are a family of conducting polymers closely related to polyacetylene. They are created by the 1,4 topochemical polymerization of diacetylenes. They have multiple applications from the development of organic films to immobili ...

, a family of conducting polymers *

Predictive analytics Predictive analytics encompasses a variety of Statistics, statistical techniques from data mining, Predictive modelling, predictive modeling, and machine learning that analyze current and historical facts to make predictions about future or other ...

, a form of business analytics *

Pushdown automaton In the theory of computation, a branch of theoretical computer science, a pushdown automaton (PDA) is a type of automaton that employs a stack. Pushdown automata are used in theories about what can be computed by machines. They are more capab ...

, in automata theory

Biology and medicine

Pancreatic ductal adenocarcinoma The pancreas (plural pancreases, or pancreata) is an organ of the digestive system and endocrine system of vertebrates. In humans, it is located in the abdomen behind the stomach and functions as a gland. The pancreas is a mixed or heterocrine ...

, the main type of pancreatic cancer * Pathological demand avoidance, in psychology *

Patent ductus arteriosus Patent ductus arteriosus (PDA) is a medical condition in which the ''ductus arteriosus'' fails to close after childbirth, birth: this allows a portion of oxygenated blood from the left heart to flow back to the lungs from the aorta, which has a h ...

, a heart defect *

Posterior descending artery In the coronary circulation, the posterior descending artery (PDA), also called the posterior interventricular artery (PIV, PIA, or PIVA), is an artery running in the posterior interventricular sulcus to the apex of the heart where it meets with ...

, an artery *

Potato dextrose agar Potato dextrose agar (BAM Media M127
from the ...

, a microbiological media for culturing yeast and fungus

Music

* "PDA" (Interpol song), a song by Interpol * "PDA", a song by the Backstreet Boys from ''

This Is Us ''This Is Us'' is an American drama television series created by Dan Fogelman that aired on NBC from September 20, 2016, to May 24, 2022. The series follows the lives and families of two parents and their three children in several different ti ...

'' * "PDA", a song by Audio Adrenaline from ''

Audio Adrenaline Audio Adrenaline was an American Christian rock band that formed in 1986 at Kentucky Christian University in Grayson, Kentucky. The band gained recognition during the 1990s and received two Grammy Awards and multiple Dove Awards. Audio A ...

'' * " P.D.A. (We Just Don't Care)", a song by John Legend

Organizations

* Parenteral Drug Association, a global pharmaceutical trade association *

Pharmacists' Defence Association The Pharmacists' Defence Association is a not-for-profit membership organisation that supports the needs of individual pharmacists, pharmacy students and pharmacy undergraduates in the United Kingdom. Membership of the PDA includes insurance, uni ...

, UK *

Peruvian Debate Association The Peruvian Debate Association ({{langx, es, Asociacion Peruana de Debate; APD) is a legally ordained, non-profit institution, which organizes and coordinates activities to promote and increase debate in and among schools and universities in Per ...

, for inter-school debating *

Pinoy Dream Academy ''Pinoy Dream Academy'' (also known as PDA) is a Philippine television reality competition show broadcast by ABS-CBN. Originally hosted by Toni Gonzaga, Nikki Gil, Sam Milby, Bianca Gonzalez and Roxanne Barcelo. it aired on the network's weeken ...

, the Philippine franchise of Endemol's Star Academy *

Population and Community Development Association The Population and Community Development Association (PDA) is a non-governmental organization in Thailand. Its goal is to reduce poverty through both development initiatives and family planning programs. Originally called the Community-Based Family ...

, Thailand *

Private defense agency A private defense agency (PDA) is a theoretical enterprise which would provide personal protection and military defense services to individuals who would pay for its services. PDAs are advocated in anarcho-capitalism as a way of enforcing the pr ...

, an enterprise which would provide personal protection and military defense services to individuals * Professional Driver Association, of NASCAR drivers before the

1969 Talladega 500 The inaugural race in the Talladega 500 (now Yellawood 500) series was held on September 14, 1969, at Alabama International Motor Speedway in Talladega, Alabama, USA. The race is noted for the unusual series of events leading up to and duri ...

Public development authority In the U.S. state of Washington, a public development authority (most commonly PDA; also known as a public corporation) is a government-owned corporation. They are established under RCW 35.21.730.Alternative Democratic Pole The Alternative Democratic Pole ( Spanish: ''Polo Democrático Alternativo'' or PDA) is a left-wing, democratic socialist and camilist political party in Colombia, active from 2005 to the present. In 2022 it was successful at the polls and fo ...

, a political party in Colombia (''Polo Democrático Alternativo'') *

Progressive Democratic Alliance The Progressive Democratic Alliance (PDA) was a centrist political party in British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific ...

, a former political party in British Columbia, Canada *

Progressive Democrats of America Progressive Democrats of America is an American political action committee that was founded in the summer of 2004 by Kevin Spidel, the National Field Director for the Kucinich for President campaign and Tim Carpenter, the Deputy Campaign Manage ...

, a progressive political organization *

Party of Democratic Action The Party of Democratic Action (; abbr. SDA) is a Bosniak nationalist, conservative political party in Bosnia and Herzegovina. History The Party of Democratic Action (SDA) was founded on 26 May 1990 in Sarajevo, as a "party of Muslim cultural ...

, a Bosniak party in Bosnia-Herzegovina *

Movement of Democratic Action The Movement of Democratic Action ( Bosnian: ''Pokret demokratske akcije'' or PDA) is a conservative political party in Bosnia and Herzegovina. History The party was founded by Mirsad Kukić in 2018. After Kukić was removed from the SDA Canton ...

, a political party in Bosnia-Herzegovina (''Pokret demokratske akcije'') * Aruban Democratic Party, an Aruban political party (''Partido Democrático Arubano'')

Law and culture

Public display of affection Public displays of affection (PDA) are acts of physical intimacy in the view of others. What is considered to be an acceptable display of affection varies with respect to culture and context. Some organizations have rules limiting or prohib ...

, an act of physical intimacy in the view of others *

Pregnancy Discrimination Act The Pregnancy Discrimination Act (PDA) of 1978 () is a United States federal statute. It amended Title VII of the Civil Rights Act of 1964 to "prohibit sex discrimination on the basis of pregnancy." The Act covers discrimination "on the basis ...

, US * "PDA" (''The Office''), an episode from the American television sitcom ''The Office'' * ''

Past Doctor Adventures The ''Past Doctor Adventures'' (sometimes known by the abbreviation ''PDA'' or ''PDAs'') were a series of spin-off novels based on the long running BBC science fiction television series ''Doctor Who'' and published under the BBC Books imprint. ...

'', spin-off novels from the BBC's ''Doctor Who'' * Pub Design Awards, UK * Professional Development Award, offered by the Scottish Qualification Authority {{Disambiguation