QSO may refer to:
*Quasi-stellar object or
quasar
A quasar ( ) is an extremely Luminosity, luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with a mass rangi ...
*
Queen's Service Order
The King's Service Order () established by royal warrant of Queen Elizabeth II on 13 March 1975, is used to recognise "valuable voluntary service to the community or meritorious and faithful services to the Crown or similar services within the ...
, New Zealand honour
*
Queensland Symphony Orchestra
Queensland Symphony Orchestra (QSO) is an Australian symphony orchestra in the state of Queensland. The orchestra is based in the Australian Broadcasting Corporation's building in South Bank. The Orchestra is funded by private corporations, the ...
*
The Quantic Soul Orchestra
William Holland (born 18 April 1980) is an English musician, DJ, and record producer. Holland records under various pseudonyms, including Quantic, the Quantic Soul Orchestra, The Limp Twins, Flowering Inferno, and Ondatrópica. His music fea ...
*
QSO, a Q code used in commercial and amateur radio communication
*The IATA airport code for
Sousse
Sousse, Sūsah , or Soussa (, ), is a city in Tunisia, capital of the Sousse Governorate. Located south of the capital Tunis, the city has 271,428 inhabitants (2014). Sousse is in the central-east of the country, on the Gulf of Hammamet, which ...
, Tunisia
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