| Acronym | Definition |
|---|
| FSTD➣Frequency Switched Transmit Diversity (electrical engineering) |
| FSTD➣Flight Simulation Training Device |
| FSTD➣Fonds de Soutien aux Territoires en Difficultés (French: Fund to Support Territories in Difficulty; Canada) |
| FSTD➣Finite-State Transition Diagram |
| FSTD➣Fire Support Test Directorate |
| FSTD➣Facility-Specific Training Directory |
| FSTD➣Fast Stock Time of Day (racing term) |