PSO
# PSO

PSO may refer to:

In music:

* Pacific Symphony Orchestra
* Peoria Symphony Orchestra
* Pittsburgh Symphony Orchestra
* Plano Symphony Orchestra
* Portland Symphony Orchestra
* Perth Symphony Orchestra

In science and technology:

* Particle swarm optimization, a swarm intelligence optimization technique
* Password Settings Object, used in Windows Active Directory environments
* Phase-shift oscillator, an electronic circuit that generates sine waves
* Protocol Support Organization, one of the three initial components of ICANN, later disbanded
* PSO J318.5-22, a rogue planet discovered in 2013

Other uses:

* Pakistan State Oil
* Patient safety organization
* Paysite operator, the operator of a paysite, typically pornographic
* Peace Support Operations, a military term used by NATO
* Penalty shootout, a method of determining a winner in sports matches which would have otherwise been drawn or tied
* Phantasy Star Online, a series of online role-playing video games
   * Phantasy Star Online, the first game in the series
* Phone sex operator, a person who provides phone sex service
* Producers Sales Organization, an independent motion picture production and distribution company
* Protective services officer, a member of police in Australia who performs policing duties at specific locations
* Psoriasis, an autoimmune disease
* PSO-1, a Soviet telescopic sight
* Public Safety Officer, another name for police, firefighters, ambulance crews and other providing safety services in the U.S.
* Public Service Company of Oklahoma
* Public service obligation, a form of state subsidy for transport links which are not commercially viable
* Puro Sangue Orientale, a breed of horse in Italy
* The FAA LID code for Stevens Field airport in Archuleta County, Colorado, United States.
* The IATA code for Antonio Nariño Airport, serving the Colombian city of Pasto
* It also refers to Personal Security Officers.
* Provider Services Operations, a team at the National Marrow Donor Program
