What does DDF stand for?

What does DDF mean?

DDF	Doctors Dermatologic Formula Miscellaneous » Unclassified
DDF	Doctors Dermatological Formula Miscellaneous » Unclassified
DDF	Dominion Drama Festival Community » Conferences
DDF	Doom Definition File Miscellaneous » Funnies
DDF	Driver Description File Computing » General
DDF	Drop Dead Fred Community » Media
DDF	Drug and Disease Free Internet » Chat
DDF	drug and disease free Medical
DDF	Dubai Duty Free Business » International Business
DDF	Dublin Dance Festival Community » Performing Arts
DDF	Dynamic Depth Focusing Miscellaneous » Photography