| Acronym | Definition |
|---|
| DSSO | Duluth Superior Symphony Orchestra (Duluth, MN) |
| DSSO | Den Stora Svenska Ordlistan (Swedish: The Great Swedish Dictionary) |
| DSSO | Data System Support Organization (US DoD) |
| DSSO | Disabled Student Services Office |
| DSSO | Deaf Services of Southern Oregon (Medford, OR) |
| DSSO | Defense Systems Support Organization |
| DSSO | Defence Security Standards Organisation (UK) |
| DSSO | Device Selection Scripting Object (Microsoft) |
| DSSO | Dynamic Single Step Optimization |
| DSSO | Defense Surplus Sales Office |
| DSSO | Dealer Sponsored Servicing Owner |
| DSSO | Doncaster Schools Senior Orchestra (UK) |
| DSSO | double switched socket outlet |