Analog to Digital Converter 
Astronomical Data Center 
Air Defense Command 
Aerospace Defense Command 
Air Data Computer 
Analog to Digital Converters 
Automatic Distance Control 
Aide de Camp 
area damage control 
Automated Data Collection 
Air Defence Command 
Analogue to Digital Converter 
Area Distribution Center 
Automatic Data Capture 
Active Directory Connector 
Adaptive Data Compression 
Advanced Data Connector 
Affiliated Data Center 
Analog-to-Digital Computer 
analog-to-digital conversion 
Apple Developer Connection 
Apple Distribution Center 
Assistant Division Commander 
Automatic Data Collection 
Active Directory Connectors 
Active Duty Commitment 
Add with Carry 
Adult Day Care 
Advise Duration and Charge 
Against Digital Counterfeiting