MTSD
| Acronym | Definition |
|---|---|
| MTSD | Millcreek Township School District (Erie, PA) |
| MTSD | Mequon-Thiensville School District (Mequon, WI) |
| MTSD | Manheim Township School District (Lancaster, PA) |
| MTSD | Mother Truckin Skull Diggers (band) |
| MTSD | Multichannel Two-Stage Sequential Detector |
| MTSD | Magnetic Tape Storage Device |