SD1
| Acronym | Definition |
|---|---|
| SD1 | Start Deutsch 1 (German language program) |
| SD1 | Shigella Dysenteriae Type 1 |
| SD1 | School District #1 (Powell, WY) |
| SD1 | Sanitation District No. 1 of Northern Kentucky (Wright, KY) |
| SD1 | Steward First Class (Naval Rating) |
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