| Abbreviation | Definition |
|---|---|
| DDFIA | Doris Duke Foundation for Islamic Art (New York, NY) |
| DDJF | Dee Dee Jackson Foundation (Sherman Oaks, CA) |
| DDMF | Doris Duke Monument Foundation |
| DDSF | Dutch Down Support Foundation |
| DECF | Deep Eye Care Foundation |
| DEDF | Doma Education Development Foundation |
| DEF | Digital Empowerment Foundation |
| DEWF | Del E Webb Foundation |
| DFCD | Dyspraxia Foundation County Durham |
| DFEO | Downey Foundation for Educational Opportunities |
| DFEO | Downey Foundation for Educational Opportunity |
| DFF | Dharma Friendship Foundation |
| DFF | Digital Freedom Foundation |
| DFF | Discover Fitness Foundation |
| DFF | Dubai Future Foundation |
| DFF | Dutch Fashion Foundation |
| DFFS | Diversity Fixed Foundation Sets |
| DFMC | Delmarva Foundation for Medical Care |
| DFNZ | Dyslexia Foundation New Zealand |
| DFNZ | Dyslexia Foundation of New |