combined distribution frame 
Common Data Format 
Collider Detector at Fermilab 
Cable Distribution Frame 
Central Data Facility 
Confined Detonating Fuse 
Cumulative damage function 
California Department of Forestry 
Circuit Design Fabrication 
Cool-Down Facility 
Carrier Distribution Frame 
Centered Dark Field 
Communications Data Field 
Community Development Fund 
core damage frequency 
cumulative distribution function 
Career Development Facilitator 
Central Distribution Facility 
Channel Definition Format 
Charbonnages de France 
Charge Density Fluctuation 
Chief of the Defence Force 
Children's Defense Fund 
Class Determination and Findings 
Coal-Derived Fuel 
Combination Distribution Frame 
Combined Die Forging 
Comma Delimited Format 
Communications Data Formatter 
Compound Document Framework