PSA, PsA, Psa, or psa may refer to:

Biology and medicine

Posterior spinal artery The posterior spinal artery (dorsal spinal arteries) arises from the vertebral artery in 25% of humans or the posterior inferior cerebellar artery in 75% of humans, adjacent to the medulla oblongata. It supplies the grey and white posterior columns ...

Primary systemic amyloidosis Amyloid light-chain (AL) amyloidosis, also known as primary amyloidosis, is the most common form of systemic amyloidosis in the US. The disease is caused when a person's antibody-producing cells do not function properly and produce abnormal protein ...

, a disease caused by the accumulation of abnormal proteins *

Prostate-specific antigen Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the ''KLK3'' gene. PSA is a member of the kallikrein-related peptidase family and is secreted ...

, an enzyme used as a blood tracer for prostate cancer *

Psoriatic arthritis Psoriatic arthritis is a long-term inflammatory arthritis that occurs in people affected by the autoimmune disease psoriasis. The classic feature of psoriatic arthritis is swelling of entire fingers and toes with a sausage-like appearance. ...

(PsA), an inflammatory disease * ''

Pseudomonas aeruginosa ''Pseudomonas aeruginosa'' is a common encapsulated, gram-negative, aerobic– facultatively anaerobic, rod-shaped bacterium that can cause disease in plants and animals, including humans. A species of considerable medical importance, ''P. aer ...

'', a species of bacterium * ''Pseudomonas syringae'' pv. ''actinidiae'', a pathovar of a bacterium that attacks kiwifruit

Chemistry

Polar surface area The polar surface area (PSA) or topological polar surface area (TPSA) of a molecule is defined as the surface sum over all polar atoms or molecules, primarily oxygen and nitrogen, also including their attached hydrogen atoms. PSA is a commonly u ...

, the surface sum over all polar atoms of a molecule *

Pressure swing adsorption Pressure swing adsorption (PSA) is a technique used to separate some gas species from a mixture of gases (typically air) under pressure according to the species' molecular characteristics and affinity for an adsorbent material. It operates at nea ...

, a technology for separating, or purifying, gases

Computing

Professional services automation Professional services automation (PSA) is software designed to assist professionals, such as lawyers, auditors, and IT consultants, with project management and resource management for client projects and utilization rate management for billable sta ...

, software for automating project and billing management for professional service firms *

PSA Certified Platform Security Architecture (PSA) Certified is a security certification scheme for Internet of Things (IoT) hardware, software and devices. It was created by Arm Holdings, Brightsight, CAICT, Prove & Run, Riscure, TrustCB and UL as part of a ...

, Platform Security Architecture, a security certification for the Internet of Things *

Plesk Plesk is a commercial web hosting and server data center automation software developed for Linux and Windows-based retail hosting service providers. It was developed by Plesk International GmbH, with headquarters in Toronto, Canada and Scha ...

Server Administrator, a commercial web hosting automation program

Contracts, legislation, and government

* Passenger Vessel Services Act of 1886 or Passenger Services Act, US *

Primary statistical area The United States federal government defines and delineates the nation's metropolitan areas for statistical purposes, using a set of standard statistical area definitions. the U.S. Office of Management and Budget (OMB) defined and delineated 39 ...

, a collective term for metropolitan, micropolitan, and combined statistical areas *

Problem-solution approach Under the European Patent Convention (EPC), European patents shall be granted for inventions which '' inter alia'' involve an inventive step. The central legal provision explaining what this means, i.e. the central legal provision relating to the ...

, an approach for assessing inventive step at the European Patent Office *

Production sharing agreement Production sharing agreements (PSAs) or production sharing contracts (PSCs) are a common type of contract signed between a government and a resource extraction company (or group of companies) concerning how much of the resource (usually oil) extrac ...

, a contract between a government and a resource extraction company *

Public Safety Act The Jammu and Kashmir Public Safety Act, 1978 (PSA) is a preventive detention law under which a person is taken into custody to prevent them from acting harmfully against "the security of the state or the maintenance of the public order" in the ...

, a law in Jammu and Kashmir *

Public service agreement Public service agreements (PSAs) detailed the aims and objectives of UK government departments for a three-year period. PSAs were abolished in June 2010 by the Coalition Government. Such agreements also "describe how targets will be achieved and ...

, UK government department targets for 3-year period *

Public service announcement A public service announcement (PSA) is a message in the public interest disseminated by the media without charge to raise public awareness and change behavior. In the UK, they are generally called a public information film (PIF); in Hong Kong, ...

* Purchase and sale agreement, an agreement between a buyer and a seller

Organizations

World-wide scope

Pacific Science Association The Pacific Science Association (PSA) is a regional, non-governmental, scholarly organization that seeks to advance science and technology in support of sustainable development in the Pacific Rim. It was founded in 1920 and its secretariat is ba ...

* Pacific Sociological Association *

Philosophy of Science Association The Philosophy of Science Association (PSA) is an international academic organization founded in 1933 that promotes research, teaching, and free discussion of issues in the philosophy of science from diverse standpoints. The PSA engages in activit ...

Pro Snowboarders Association The Pro Snowboarders Association (PSA) is organized to promote and protect the rights and personalities of professional snowboarders. The Association was created in March 1990 in Lenzerheide Lenzerheide ( Romansh: ''Lai'') is a mountain re ...

Professional Skaters Association The Professional Skaters Association International is the largest figure skating coaches association in the world. The PSA was founded on August 10, 1938, in Lake Placid, New York, as the American Skaters Guild, just two years (1936) after the I ...

Professional Squash Association The Professional Squash Association (PSA) is the governing body for the men's and women's professional squash circuit. The body operates in a similar fashion to the ATP and the WTA for tennis. The PSA's highest professional level, the PSA Wor ...

Specific to large English-speaking countries

* Australia: **

Pharmaceutical Society of Australia The Pharmaceutical Society of Australia (PSA) is a professional organisation of Australian pharmacists. PSA is the peak national body for pharmacists, representing all of the pharmacy profession in Australia, with approximately 18,000 member ...

Public Schools Association Established in 1905 the Public Schools Association, or the PSA, is an association of seven independent boys schools in Perth, Western Australia. The descriptor 'public school' references the historical usage of the term and the model of the Brit ...

, Perth **

Public Service Association of NSW The Public Service Association of NSW (PSA) is a union which covers employees in the government, university and related public sector in New South Wales. The union is registered under New South Wales state legislation and is affiliated with the ...

, a trade union **

The Salvation Army, Parramatta The Salvation Army, Parramatta (often abbreviated to ''PSA'') is a Salvation Army Corps located in the suburb of Parramatta, New South Wales, Australia. It is the 75th oldest active Salvation Army Corps in Australia. Situated in the western su ...

* United Kingdom: **

Phone-paid Services Authority The Phone-paid Services Authority (PSA), known as PhonepayPlus until 1 November 2016, is the regulatory body for all premium rate phone-paid services in the United Kingdom. These are the content, goods and services that consumers can buy by c ...

Political Studies Association The Political Studies Association (PSA) is a learned society in the United Kingdom which exists to develop and promote the study of politics. It is the leading association in its field in the United Kingdom, with an international membership includi ...

, for academics **

Professional Standards Authority for Health and Social Care The Professional Standards Authority for Health and Social Care (PSA) oversees the nine statutory bodies that regulate health professionals in the United Kingdom and social care in England. Where occupations are not subject to statutory regulation ...

Property Services Agency The Property Services Agency (PSA) was an agency of the United Kingdom government, in existence from 1972 to 1993. Its role was to “provide, manage, maintain, and furnish the property used by the government, including defence establishments, offi ...

, former government agency * United States: ** Partnership for a Secure America **

Photographic Society of America The Photographic Society of America (PSA) is one of the largest, non-profit organizations of its kind. Established in 1934, it has expanded to include members of over 60 countries. The mission of this association is to promote and enhance the ar ...

Pi Sigma Alpha Pi Sigma Alpha ( or PSA), the National Political Science Honor Society, is the only honor society for college and university students of political and social sciences in the United States. Its purpose is to recognize and promote high academic ...

, college honor society for political science ** Poultry Science Association

Other country-specific organizations

Parti Solidaire Africain The Parti Solidaire Africain () or PSA was a political party active in the Belgian Congo and subsequently in the Republic of the Congo after the country received its independence. The PSA was formed in the aftermath of a series of riots in L ...

(Democratic Republic of the Congo), defunct political party *

New Zealand Public Service Association The Public Service Association ( mi, Te Pūkenga Here Tikanga Mahi) or PSA is a democratic trade union that represents over workers in the Aotearoa New Zealand public sector. The aims of the PSA are: * strong public and community services * ...

, trade union *

PSA BPOL The special unit Polizeiliche Schutzaufgaben Ausland der Bundespolizei (PSA BPOL) ("Police Protection Tasks Abroad of the Federal Police", formerly known as ''ASSIK'' for ''Arbeitsstab Schutzaufgaben in Krisengebieten'') is a specialized unit of t ...

a specialised police unit within the Federal Police of Germany *

Petroleum Safety Authority Norway The Petroleum Safety Authority Norway ( no, Petroleumstilsynet, PSA) is a Norwegian governmental supervisory authority under the Norwegian Ministry of Labour and Social Inclusion. The PSA has regulatory responsibility for safety, emergency prep ...

, governmental supervisory authority *

Palestinian Scout Association The Palestinian Scout Association ( ar, جمعية الكشافة والمرشدات الفلسطينية) is the organization responsible for the Scout movement in Palestine. The Palestinian Scout Association serves youth throughout the Stat ...

Philippine Statistics Authority The Philippine Statistics Authority ( Filipino: ''Pangasiwaan ng Estadistika ng Pilipinas''), abbreviated as PSA, is the central statistical authority of the Philippine government that ''collects, compiles, analyzes and publishes statistical in ...

* Philippine Support Association, raising credit for the poor *

Polish Society of Actuaries The Polish Society of Actuaries (PSA, pl, Polskie Stowarzyszenie Aktuariuszy) is the association of actuaries in Poland. The society was established in 1991 to resume activities of the Polish Institute of Actuaries founded in 1920. It is a full mem ...

PSA International PSA International Pte Ltd is a port operator and supply chain company, with flagship operations in Singapore and Antwerp. One of the largest port operators in the world, PSA has terminals across 26 countries, including deepsea, rail and inland f ...

(Singapore), formerly Port of Singapore Authority * Public Servants Association of South Africa, trade union *''Partido Socialista de Andalucía'' (Spain), former name of the

Andalusian Party The Andalusian Party ( es, Partido Andalucista, PA) was an Andalusian nationalist centre-left political party from Andalusia (Spain), with an important presence in provinces such as Cádiz and Seville although in the past they have stood in other ...

* Socialist Party of Aragon (''Partido Socialista de Aragón''), a now defunct Spanish political party * Authentic Socialist Party (Argentina), ''Partido Socialista Auténtico'' *

Public Services Association The Public Services Association of Trinidad and Tobago (PSA) is a trade union in Trinidad and Tobago. It was originally known as the Civil Service Association but changed its name in 1971. The bulk of the PSA membership is in the public sector ...

(Trinidad and Tobago), a trade union *''Partido Socialista Argentino'', the

Argentine Socialist Party The Argentine Socialist Party was a socialist political party in Argentina formed after the third division of the Socialist Party. History Origin When democracy was restored (though peronism became illegal) in 1958, a Socialist Party congres ...

, a now merged Argentinian political party

Transport

PSA Airlines PSA Airlines is an American regional airline headquartered at Dayton International Airport in Dayton, Ohio, United States. The airline is a wholly owned subsidiary of the American Airlines Group and it is paid by fellow group member American ...

, a subsidiary of American Airlines Group * Pisa International Airport, Pisa, Italy, IATA code PSA *

Pacific Southwest Airlines Pacific Southwest Airlines (PSA) was a regional airline, regional List of airlines of the United States, U.S. airline headquartered in San Diego, California, that operated from 1949 to 1998. It was the first large low-cost carrier, discount airl ...

, US, 1949 to 1988, ICAO code PSA *

Penn Station Access Penn Station Access is a public works project underway by the Metropolitan Transportation Authority in New York City. The goal of the project is to allow Metro-North Railroad commuter trains to access Penn Station on Manhattan's West Side, usi ...

, a planned New York City rail upgrade *

Groupe PSA The PSA Group (), legally known as Peugeot S.A. (Peugeot Société Anonyme, trading as Groupe PSA; formerly known as PSA Peugeot Citroën from 1991 to 2016) was a French multinational automotive manufacturing company which produced automobiles ...

, ''Peugeot Société Anonyme'', a French multinational automobile manufacturer

Other uses

Penal substitution Penal substitution (sometimes, esp. in older writings, called forensic theory)D. Smith, The atonement in the light of history and the modern spirit' (London: Hodder and Stoughton), p. 96-7: 'THE FORENSIC THEORY...each successive period of history ...

, a theory of atonement in Christianity *

Professional Sports Authenticator Professional Sports Authenticator (PSA), is a US based sports card and trading card grading company. History PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve ...

(PSA), part of

Collectors Universe Collectors Universe Inc. is an American company formed in 1986, now based in Santa Ana, California, which provides third-party authentication and grading services to collectors, retail buyers and sellers of collectibles. Its authentication servi ...

, an authenticator of sports and trading cards * Autonomous Socialist Party (disambiguation) * Pisa language or Asue Awyu, ISO 639-3 code psa *

Piscis Austrinus Piscis Austrinus is a constellation in the southern celestial hemisphere. The name is Latin for "the southern fish", in contrast with the larger constellation Pisces, which represents a pair of fish. Before the 20th century, it was also known a ...

(Southern Fish) constellation, IAU abbreviation PsA * Public Storage stock ticker *

Power Station of Art The Power Station of Art is a contemporary art museum in Shanghai. Housed in a former power station, it is China's first state-run contemporary art museum. Converting the building cost $64 million which was paid for by the Shanghai government. ...

, a contemporary art museum in Shanghai, China *

Pressure-sensitive adhesive Pressure-sensitive adhesive (PSA, self-adhesive, self-stick adhesive) is a type of nonreactive adhesive which forms a bond when pressure is applied to bond the adhesive with a surface. No solvent, water, or heat is needed to activate the adhesiv ...

* "PSA", title of an earlier version of the R.E.M. song " Bad Day" {{Disambiguation