| Acronym | Definition |
|---|
| DSAO➣Du Sud a l'Ouest (French: South West; architecture firm) |
| DSAO➣Down Syndrome Association of Ontario (Ottawa, Ontario, Canada) |
| DSAO➣Driving School Association of Ontario (est. 1975; Canada) |
| DSAO➣Disabled Sailing Association of Ontario (Canada) |
| DSAO➣Drainage Superintendents Association of Ontario (Canada) |
| DSAO➣Diploma in Small Animal Orthopaedics (UK) |
| DSAO➣Design Structuring and Allocation Optimization |