Display Data Channel 
Defense Distribution Center 
Direct Digital Control 
Data Distribution Center 
Defense Documentation Center 
Digital Data Converter 
Data Device Corporation 
Data Distribution Centre 
Deck Decompression Chamber 
Developmental Disabilities Council 
Dewey Decimal Classification 
Digital Data Cell 
Direct Department Calling 
Direct Digital Controls 
Disk Drive Controller 
Drifter Data Center 
Destination Delivery Charge 
Digital Data Channel 
Digital Data Control 
Digital data conversion 
DIGITAL DISPLAY CONVERTER 
Division Data Center 
Document Development and Control 
Driver Developer Conference 
Data Display Channel 
Deadlock Detection Coordinator 
Decimating Down Converter 
dedeoxycytidine 
Defense Documentation Center's 
Defensive Driving Card