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, libra ...
, a mechanism for libraries to purchase books
*
Personal digital assistant
A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager. PDAs have been mostly displaced by the widespread adoption of highly capable smartphones, in part ...
, a mobile device
*
Photodiode array
A photodiode is a light-sensitive semiconductor diode. It produces current when it absorbs photons.
The package of a photodiode allows light (or infrared or ultraviolet radiation, or X-rays) to reach the sensitive part of the device. The packag ...
, a type of detector
* Polydiacetylenes, a family of conducting polymers
*
Pitch detection algorithm
Pitch may refer to:
Acoustic frequency
* Pitch (music), the perceived frequency of sound including "definite pitch" and "indefinite pitch"
** Absolute pitch or "perfect pitch"
** Pitch class, a set of all pitches that are a whole number of octav ...
, to find the pitch of a signal
*
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 ...
, a type of abstract device in automata theory
Biology and medicine
*
Pancreatic ductal adenocarcinoma
The pancreas 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 gland, i.e. it has both an endocr ...
, the main type of pancreatic cancer
*
Patent ductus arteriosus
''Patent ductus arteriosus'' (PDA) is a medical condition in which the ''ductus arteriosus'' fails to close after birth: this allows a portion of oxygenated blood from the left heart to flow back to the lungs by flowing from the aorta, which has ...
, a heart defect
*
Posterior descending artery
In the coronary circulation, the posterior interventricular artery (PIV, PIA, or PIVA), most often called the posterior descending artery (PDA), is an artery running in the posterior interventricular sulcus to the apex of the heart where it mee ...
* "PDA" (song), a song by Interpol
* "PDA", a song by the Backstreet Boys from ''
This Is Us
''This Is Us'' is an American family drama television series 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 time frames. It s ...
''
* "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 Adr ...
Pinoy Dream Academy
''Pinoy Dream Academy'' (also known as PDA) is the Philippine version of Endemol's ''Operación Triunfo'' (Operation Triumph). The format is similar to Big Brother, where a set number of finalists (billed as "scholars" throughout the series) wo ...
, 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 sy ...
, 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.
Background
Talladega Superspeedway – originally known as Alabama Intern ...
*
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 political party in Colombia.
It was founded as a political alliance of the Independent Democratic Pole (PDI) and the Democratic Alternative (AD ...
, a political party in Colombia (''Polo Democrático Alternativo'')
*
Progressive Democratic Alliance
The Progressive Democratic Alliance (PDA) was a centrist political party in British Columbia, Canada founded by Gordon Wilson, Member of the Legislative Assembly (MLA) for Powell River—Sunshine Coast.
Wilson, previously the leader of the ...
, a former political party in British Columbia, Canada
*
Progressive Democrats of America
Progressive Democrats of America (PDA) is a progressive political organization and grassroots political action committee operating primarily within the Democratic Party of the United States. The group has established chapters in 32 states and ter ...
, a progressive political organization
*
Party of Democratic Action
The Party of Democratic Action ( bs, Stranka demokratske akcije; 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, ...
, 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 an acceptable display of affection varies with respect to culture and context.
Some organizations have rules limiting or prohibiting public display ...
, acts 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 of ...
, 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
The Pub Design Awards (PDA) are an annual awards, established in 1983 and hosted by CAMRA in association with English Heritage and the Victorian Society, that are given to exceptional pubs in the UK that have been newly built/converted or have r ...
, UK
* Professional Development Award, offered by the
Scottish Qualification Authority
The Scottish Qualifications Authority (SQA; Gaelic: ''Ùghdarras Theisteanas na h-Alba'') is the executive non-departmental public body of the Scottish Government responsible for accrediting educational awards. It is partly funded by the Ed ...