1. Abstract Data Type
2. (research) Accelerated Degradation Testing
3. Accumulated Deployed Time
4. Acknowledged Data Transfer
5. Active Denial Technology
6. Active Duty for Training
7. Active Duty Tour
8. Admissions, Discharge, Transfer
9. Adult
10. (audio recording) Automatic Double Tracking
11. Advanced DRAM Technology
12. (hiking) American Discovery Trail
13. (astronomy education) Astronomy Diagnostic Test
14. (traffic information) Average Daily Traffic

See also

• Wikipedia on ADT
• Active Denial Technology -- globalsecurity.org -- "Vehicle-Mounted Active Denial System (V-MADS)"