Active Duty for Training 
Atlantic Daylight Time 
abstract data type 
Actual Dive Time 
Average Daily Traffic 
Access Developer's Toolkit 
Active Denial Technology 
Active Duty Training 
Automatic Data Translator 
Academic Degree Training 
Application Data Type 
Application Development Tools 
Automatic Detection and Tracking 
automatic digital tester 
Abstract Data Types 
adenosine triphosphate 
Admission/Discharge/Transfer 
admission-discharge-transfer 
aerated drain tank 
Air Data transducer 
air dry ton 
Airborne Data Terminal 
American District Telegraph 
Androgen deprivation therapy 
Application Data Types 
Approved Departure Time 
Architectural Development Team 
Assign Digital Transmission Group 
Assistant Director for Training 
atomic damage template