DDF
- 4,4'-Dinitro-3,3'-diazenofuroxan
- Central Indochina dry forests
- Dicastery for the Doctrine of the Faith
- Digestive Disorders Foundation
- Digital distribution frame
- Dipterocarpaceae
- Disk Data Format
- Drop Dead Fred
- Dubai Duty Free
- Photoaffinity labeling
- Sulfoxone
- Tropical and subtropical dry broadleaf forests