Common Data Format 
Cutoff Decrease Factor 
Combat Direction Finding 
Channel Definition Format 
Collider Detector at Fermilab 
core damage frequency 
cumulative distribution function 
Common Data File 
cumulative damage function 
California Department of Forestry 
Centered Dark Field 
Central Data Facility 
Channel Definition File 
Children's Defense Fund 
Combined Distributing Frame 
combined distribution frame 
Community Development Fund 
Compound Document Framework 
Cable Distribution Frame 
Career Development Facilitator 
Carrier Distribution Frame 
Central Distribution Facility 
Charbonnages de France 
Charge Density Fluctuation 
Chief of the Defence Force 
Circuit Design Fabrication 
Class Determination and Findings 
Coal-Derived Fuel 
Combination Distribution Frame 
Comma Delimited Format