RSO
# RSO

RSO or R.S.O. may refer to:

## Roles and titles

* Range safety officer, a person responsible for the safe use of rocket vehicles
* Radiation Safety Officer, a person responsible for the safe use of radiation and radioactive materials
* Regional Security Officer, a Diplomatic Security Service Special Agent in charge of security at a US embassy
* Regional Security Office, office in a US embassy or consulate for the Diplomatic Security Service
* Riddare av Svärdsorden, Knight of the Order of the Sword
* Reconnaissance systems officer, operator of surveillance systems and equipment on a Lockheed SR-71 Blackbird aircraft

## Organisations

* "Radio Symphony Orchestra", used by a number of orchestras:
   * Danish National Symphony Orchestra, based in Copenhagen, Denmark
   * North German Radio Symphony Orchestra, based in Hamburg, Germany
   * Stuttgart Radio Symphony Orchestra, based in Stuttgart, Germany
   * Bavarian Radio Symphony Orchestra, based in Munich, Germany
   * Frankfurt Radio Symphony Orchestra, based in Frankfurt, Germany
   * Finnish Radio Symphony Orchestra
   * Swedish Radio Symphony Orchestra
   * Vienna Radio Symphony Orchestra
* Richardson Symphony Orchestra, based in Richardson, Texas
* Roanoke Symphony Orchestra, based in Roanoke, Virginia
* Rogers Sportsnet Ontario, a television station in Ontario, Canada
* RSO Records, a record label formed by Robert Stigwood in the late 1960s
* Rohingya Solidarity Organisation, a political organization and former insurgent group in Myanmar (Burma)

## Military technology

* Raupenschlepper, Ost, a fully tracked World War II German artillery tractor
* Radschlepper Ost, a wheeled World War II German artillery tractor

## Other

* Railway Sub Office (1855-1905), a British Royal Mail office which received mail directly from rail transport
* Reactive Search Optimization, problem-solving methods with integrated online machine-learning capabilities
* Revised Statutes of Ontario, the provincial laws of Ontario, Canada
* Registered sex offender, a person listed on a sex offender registry
* Republic of South Ossetia, a separatist organization in Georgia
* Resident Space Object, any man-made object in Earth orbit no longer used by anyone
* RSO, musical duo consisting of American musician Richie Sambora and Australian musician Orianthi
* Rick Simpson Oil, a form of cannabis concentrate
* Red Star OS, also abbreviated as RSOS, is a North Korean operating system
