| Abbreviation | Definition |
|---|---|
| ADLC | Alberta Distance Learning Centre |
| ADMB | Animal Damage Management Board |
| ADMC | Advanced Determination of Medicare Coverage |
| ADMH | Alabama Department of Mental Health |
| ADO | Austin Drawing Office |
| ADOT | Arizona Department Of Transportation |
| ADPCE | Arkansas Department of Pollution Control and Ecology |
| ADPE | Area Driving Performance Evaluation |
| ADPS | Albion Department of Public Safety |
| ADR | Alternative Dispute Resolution (Mediation) |
| ADRC | Aging and Disabled Resource Center |
| ADSA | Assistance Dog Special Allowance |
| ADSD | Nevada Aging and Disability Services Division |
| ADT | Arizona Driving Trial |
| ADWE | Arkansas Department of Workforce Education |
| ADWM | Arizona Department of Weights and Measures |
| ADWR | Arizona Department of Water Resources |
| ADWR | Arkansas Department of Water Resources |
| AED | Agricultural Extension Division |
| AEDA | Alberta Economic Development Authority |