YSO


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AcronymDefinition
YSOYoung Stellar Object
YSOYale Symphony Orchestra
YSOYouth Soccer Organization (various organizations)
YSOYttrium Oxyorthosilicate
YSOYoungstown Symphony Orchestra (Youngstown, OH)
YSOYork Symphony Pops Orchestra
YSOYlivieskan Sosiaalialan Oppilaitos (Finnish: Ylivieska Social Institution; Ylivieska, Finland)
YSOYouth Sector Organisation (Singapore)