| Development Finance Institutions | Academic & Science |
| Defiance (oh) | Airport Code |
| Don Facciobene Inc | Business |
| Detroit Forming Inc | Business |
| Direct Fuel Injection | Business |
| Diamond Flower, Inc. | Business |
| Dream Factory, Inc. | Business |
| Deep Foundations Institute | Business |
| Dairy Farm International Holdings, LTD. | Business |
| Diamond Fields International, LTD. | Business |
| Development Facilitators Inc | Business |
| Department of Financial | Business |
| Development Finance Initiative | Community |
| Dunamis Fellowship International | Community |
| Darrell D. Friedman Institute | Community |
| District Fundraising Initiative | Community |
| Damage Free Intelligence | Computing |
| Digital Filter Initialization | Computing |
| Disk From Image | Computing |
| Defect Free Interface | Computing |
| Digital Facility Interface | Computing |
| Design For Innovation | Computing |
| DfiStarter | Cryptocurrency |
| DeFiChain | Cryptocurrency |
| Digifont Outline Font Description | File Type |
| Different F***ing Idea | General |
| Discount for Invoice | General |
| Diamond Flower International | General |
| Digital Fuel Injection | General |
| Dumb F***ing Idea | General |
| Dynamic Frothability Index | General |
| Distributed Fuel Injection | General |
| Diesel Fuel Injection | General |
| Direct Filter Injection | General |
| Diesel Flow Improver | General |
| Directional Fuel Injection | General |
| Dongfeng Automotive Investment | General |
| Direct Fire Ignition | General |
| Damned Frigging Idiot | General |
| Defining Formula for Inhabitation | General |
| Diamon Fusion International | General |
| Designated Financial Institution | Governmental |
| Department of Financial Institutions | Governmental |
| Digital Forensic Investigator | Governmental |
| Division of Financial Institutions | Governmental |
| Dipartimento Federale dell'Interno | International |
| Disability Federation of Ireland | Medical |
| Disease Free Interval | Medical |
| Data Field Identifier | Military and Defence |
| Department of Factories Inspectorate | Regional |
| Defiance Memorial Airport, Defiance, Ohio USA | Regional |
| Development Flight Instrumentation | Space Science |
| Derivative Financial Instrument | Stock Exchange |