| Acronym | Definition |
|---|
| SDY➣Schenectady (Amtrak station code; Schenectady, NY) |
| SDY➣Sequential Data Set System Printer |
| SDY➣Sidney, MT, USA (Airport Code) |
| SDY➣Starter Deck Yugi (Yu-Gi-Oh cards) |
| SDY➣South Dekalb YMCA (Decatur, GA) |
| SDY➣Sequential Day of the Year (date format) |