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

Biology and medicine

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, an enzyme used as a blood tracer for prostate cancer * Psoriatic arthritis (PsA), an inflammatory disease * '' Pseudomonas aeruginosa'', a species of bacterium * ''Pseudomonas syringae'' pv. ''actinidiae'', a pathovar of a bacterium that attacks kiwifruit

Chemistry

* Polar surface area, the surface sum over all polar atoms of a molecule * Pressure swing adsorption, a technology for separating, or purifying, gases

Computing

* Professional services automation, 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 o ...

, Platform Security Architecture, a security certification for the Internet of Things * Plesk 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, 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, 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, UK government department targets for 3-year period * Public service announcement *

Purchase and sale agreement A purchase and sale agreement (PSA) is an agreement between a buyer and a seller of real estate property, company stock, or other assets. The person, company, or other legal entity In law, a legal person is any person or 'thing' (less ambig ...

, an agreement between a buyer and a seller

Organizations

World-wide scope

* Pacific Science Association * Pacific Sociological Association * Philosophy of Science Association * Pro Snowboarders Association * Professional Skaters Association * Professional Squash Association

Specific to large English-speaking countries

* Australia: ** Pharmaceutical Society of Australia ** Public Schools Association, Perth ** Public Service Association of NSW, a trade union ** The Salvation Army, Parramatta * United Kingdom: ** Phone-paid Services Authority ** Political Studies Association, for academics ** Professional Standards Authority for Health and Social Care ** Property Services Agency, 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, college honor society for political science ** Poultry Science Association

Other country-specific organizations

* Parti Solidaire Africain (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 a specialised police unit within the Federal Police of Germany * Petroleum Safety Authority Norway, 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 * Philippine Support Association, raising credit for the poor * Polish Society of Actuaries *

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 * 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, a subsidiary of American Airlines Group * Pisa International Airport, Pisa, Italy, IATA code PSA * Pacific Southwest Airlines, US, 1949 to 1988, ICAO code PSA * Penn Station Access, a planned New York City rail upgrade * Groupe PSA, ''Peugeot Société Anonyme'', a French multinational automobile manufacturer

Other uses

* Penal substitution, a theory of atonement in Christianity * Professional Sports Authenticator (PSA), part of Collectors Universe, an authenticator of sports and trading cards *

Autonomous Socialist Party (disambiguation) Autonomous Socialist Party may refer to: *Autonomous Socialist Party (France) The Autonomous Socialist Party (french: Parti socialiste autonome, PSA) was a splinter party from the French Section of the Workers' International (SFIO). It was found ...

* Pisa language or Asue Awyu, ISO 639-3 code psa * Piscis Austrinus (Southern Fish) constellation, IAU abbreviation PsA * Public Storage stock ticker * Power Station of Art, a contemporary art museum in Shanghai, China * Pressure-sensitive adhesive * "PSA", title of an earlier version of the R.E.M. song " Bad Day" {{Disambiguation