- YSO stands for Yellow Springs, Ohio
- YSO stands for Young Stellar Object
- YSO stands for Yale Symphony Orchestra
- YSO stands for Yamagata Symphony Orchestra (Japan)
- YSO stands for Youth Service Officer
- YSO stands for Youth Soccer Organization (various organizations)
- YSO stands for Yttrium Oxyorthosilicate
- YSO stands for Youngstown Symphony Orchestra (Youngstown, OH)
- YSO stands for York Symphony Pops Orchestra
- YSO stands for Ylivieskan Sosiaalialan Oppilaitos (Finnish: Ylivieska Social Institution; Ylivieska, Finland)
- YSO stands for Youth Sector Organisation (Singapore)
Abbreviations And Their Meaning