| Acronym | Definition |
|---|
| ATDD➣Amnesia: The Dark Descent (video game) |
| ATDD➣Ajman Tourism Development Department (United Arab Emirates) |
| ATDD➣Atmospheric Turbulence and Diffusion Division |
| ATDD➣Acceptance Test-Driven Development |
| ATDD➣American Train Dispatchers Department (International Brotherhood of Locomotive Engineers and Trainmen) |
| ATDD➣Adaptive Time Division Duplexing (LMDS) |
| ATDD➣Automatic Telephone Disconnect Device |