Posted in Government & Military, Information Technology, Organizations, Schools & Education, Science DSSO stands for Duluth Superior Symphony Orchestra (Duluth, MN) DSSO stands for Den Stora Svenska Ordlistan (Swedish: The Great Swedish Dictionary) DSSO stands for Data System Support Organization (US DoD) DSSO stands for Disabled Student Services Office DSSO stands for Deaf Services of Southern Oregon (Medford, OR) DSSO stands for Defense Systems Support Organization DSSO stands for Defence Security Standards Organisation (UK) DSSO stands for Device Selection Scripting Object (Microsoft) DSSO stands for Dynamic Single Step Optimization