PSO may refer to:

Orchestras

Pacific Symphony Orchestra The Pacific Symphony is a symphony orchestra based in Orange County, California. The orchestra performs at the Renée and Henry Segerstrom Concert Hall as a part of the Segerstrom Center for the Arts in Costa Mesa, California. From 1987 to 2016, ...

Peoria Symphony Orchestra The Peoria Symphony Orchestra is an American orchestra based in Peoria, Illinois conducted by George Stelluto. It is the fourteenth oldest orchestra in the United States. History Founded in 1897 as Bradley University's Bradley Symphony Orches ...

Pittsburgh Symphony Orchestra The Pittsburgh Symphony Orchestra (PSO) is an American orchestra based in Pittsburgh, Pennsylvania. The orchestra is resident at Heinz Hall, located in Pittsburgh's Cultural District. Since 2008, the orchestra's music director is Manfred Ho ...

Plano Symphony Orchestra The Plano Symphony Orchestra (PSO) is an American symphony orchestra based in Plano, Texas. The orchestra is resident at the Robinson Fine Arts Center. It offers a subscription series that combines the music of traditional classical and pops ser ...

Portland Symphony Orchestra The Portland Symphony Orchestra (PSO) was established in 1924 in Portland, Maine, United States, as the Amateur Strand Symphony Orchestra. Started by a small group of musicians who had sent out invitations to join their organization to people in t ...

* Perth Symphony Orchestra

Science and technology

Particle swarm optimization In computational science, particle swarm optimization (PSO) is a computational method that Mathematical optimization, optimizes a problem by iterative method, iteratively trying to improve a candidate solution with regard to a given measure of qu ...

, a swarm intelligence optimization technique * Password Settings Object, used in Windows

Active Directory Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. Windows Server operating systems include it as a set of processes and services. Originally, only centralized domain management used Active Direct ...

environments *

Phase-shift oscillator A phase-shift oscillator is a linear circuit, linear electronic oscillator circuit that produces a sine wave output. It consists of an inverting amplifier element such as a transistor or op amp with its output feedback, fed back to its input throug ...

, an electronic circuit that generates sine waves * Protocol Support Organization, one of the three initial components of

ICANN The Internet Corporation for Assigned Names and Numbers (ICANN ) is a global multistakeholder group and nonprofit organization headquartered in the United States responsible for coordinating the maintenance and procedures of several dat ...

, later disbanded * PSO J318.5-22, a rogue planet discovered in 2013

Other uses

Pakistan State Oil Pakistan State Oil Company Limited (PSOCL) operating as PSO, is a Karachi-based, state-owned energy company. Established in 1976, the company operates in the oil and gas industry.As of 2024, it maintains a network of 3,580 retail outlets, nine i ...

Patient safety organization A patient safety organization (PSO) is an organization that seeks to improve medical care by advocating for the reduction of medical errors. Common functions of patient safety organizations include health care data collection, reporting and ...

* Paysite operator, the operator of a

paysite A paysite or pay site, in the adult entertainment industry, is a website that charges money to become a member and view its content, and often produces original adult content. They can be contrasted with "free-sites", which do not charge a membe ...

, typically pornographic * Peace Support Operations, a military term used by NATO *

Penalty shootout The penalty shootout is a method of determining a winner in sports matches that would have otherwise been drawn or tied. The rules for penalty shootouts vary between sports and even different competitions; however, the usual form is similar to pe ...

, a method of determining a winner in sports matches which would have otherwise been drawn or tied * ''

Phantasy Star Online ''Phantasy Star Online'' is an online role-playing game (RPG) developed by Sonic Team and published by Sega in 2000 for the Dreamcast. It was the first successful online RPG for game consoles; players adventure with up to three others over the ...

'', a series of online role-playing video games ** ''

'', the first game in the series * Phone sex operator, a person who provides

phone sex Phone sex is a conversation between two or more people by means of the telephone which is sexually explicit and is intended to provoke sexual arousal in one or more participants. As a practice between individuals temporarily separated, it is as ...

service *

Producers Sales Organization Producers Sales Organization (PSO; also known as PSO Productions, Inc.) was an independent motion picture production and sales company founded in 1977. Initiated by Mark Damon, an actor-turned-producer, PSO mostly handled foreign sales of independ ...

, an independent motion picture production and distribution company *

Protective services officer A police community support officer (PCSO; ), or as written in legislation Community Support Officer (CSO; ), is a uniformed member of police staff in England and Wales, a role created by Section 38(2) of the Police Reform Act 2002, which was giv ...

, a member of police in Australia who performs policing duties at specific locations *

Psoriasis Psoriasis is a long-lasting, noncontagious autoimmune disease characterized by patches of abnormal skin. These areas are red, pink, or purple, dry, itchy, and scaly. Psoriasis varies in severity from small localized patches to complete b ...

, an autoimmune disease *

PSO-1 file:Tigr pso 1 med.jpg, Russian PSO-1M2 current military issue 4×24 telescopic sight file:Pso-1onsvd.jpg, View through a PSO-1 telescopic sight mounted on an SVD rifle The PSO-1 (''Прицел снайперский оптический, Pritse ...

, a Soviet telescopic sight * Public Safety Officer, another name for

police The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...

, firefighters, ambulance crews and other providing safety services in the U.S. *

Public Service Company of Oklahoma American Electric Power Company, Inc. (AEP), (railcar reporting mark: AEPX) is an American domestic electric utility company in the United States. It is one of the largest electric utility companies in the country, with more than five mi ...

Public service obligation In the context of European Union law, a public service obligation or PSO is an obligation imposed on an organisation by legislation or contract to provide a service of general interest within EU territories. PSOs may operate in any field of publi ...

, a form of state subsidy for transport links which are not commercially viable *

Puro Sangue Orientale The Purosangue Orientale or Puro Sangue Orientale (PSO) (en: "Oriental Purebred"), is an Italian horse breed developed by Royal Decree n° 2690 of 19 September 1875 in the Kingdom of Italy, which created a stud book dedicated to the breed. B ...

, a breed of horse in Italy * The FAA

LID A lid or cover is part of a container, and serves as the closure (container), closure or Seal (mechanical), seal, usually one that completely closes the object. Lids can be placed on small containers such as Tub (container), tubs as well as large ...

code for

Stevens Field Stevens Field is a public-use, general aviation airport located three miles northwest of the central business district of Pagosa Springs in Archuleta County, Colorado, Archuleta County, Colorado, United States. It is publicly owned by Archul ...

airport in Archuleta County, Colorado, United States. * The IATA code for

Antonio Nariño Airport Antonio Nariño Airport (, ) is an airport located in the town of Chachagüí and which serves the city of Pasto in the Nariño Department of Colombia. The airport is north of Pasto. It handles only domestic flights in addition to military operat ...

, serving the Colombian city of Pasto * Personal Security Officers * Provider Services Operations, a team at the

National Marrow Donor Program NMDP, formerly known as the National Marrow Donor Program and Be The Match, is a nonprofit organization founded in 1987 and based in Minneapolis, Minnesota, that operates a registry of volunteer hematopoietic cell donors and umbilical cord blood ...

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