| Desert Research Institute | Academic & Science |
| Davidson Research Initiative | Academic & Science |
| De Ridder (la) | Airport Code |
| Differential Rate of Interest | Banking |
| Darden Restaurants, Inc. | Business |
| Definition Resolution And Interpretation | Business |
| Development Resources Inc | Business |
| Data Resources Inc | Business |
| Direct Reduced Iron | Chemistry |
| Direct Relief International | Community |
| Diabetes Research Institute | Community |
| Dirty Rotten Imbeciles | Community |
| Dynamic Respiration Index | Community |
| Disable Random Interrupt | Computer Assembly Language |
| Dynamic Range Increment | Computer Hardware |
| Direct Received Invoice | Computing |
| Digital Research Inc. | Computing |
| Data Recovery Interface | Computing |
| Data Routing Interface | Computing |
| Digital Receiver Interface | Computing |
| Dual Ring Interconnect | Computing |
| Dynamic Range Increase | Electronics |
| Dietary Reference Intakes | General |
| Domain Registration Interface | General |
| Dive Rescue International | General |
| Dive Rescue Intl | General |
| Differential Reinforcement of Incompatible | General |
| Dynamic Range Increased | General |
| Directly Responsible Individual | General |
| Detection Recognition and Identification | General |
| Detection Recognition Identification | General |
| Designated Response Individual | General |
| Downtown Revitalization Initiative | General |
| D retro Inverso | General |
| Defense Reform Initiative | General |
| Deposit Resistant Injector | General |
| Discrete Roughness Index | General |
| Driver Risk Index | General |
| Driver Risk Inventory | General |
| Development of Regional Impact | Governmental |
| Daily Reference Intake | Governmental |
| Development Research Institute | Governmental |
| Disaster Recovery Institute | Governmental |
| Defense Research Institute | Governmental |
| Directorate of Revenue Intelligence | Indian Ministry of Finance |
| DUMRI JUARA | Indian Railway Station |
| Direct Rendering Infrastructure | Information Technology |
| Dietary Reference Intake | Medical |
| Department Research Initiative | Medical |
| Delaware Rehabilitation Institute | Medical |
| Dopamine Reuptake Inhibitor | Medical |
| Disability Rights International | Medical |
| Direct Rendering Interface | Networking |
| Differential Refractive Index | Physics Related |
| Davenport Rock Island and North Western RailRoad Company | Regional |
| Davenport, Rock Island and North Western Railway | Regional |
| Declarative Referential Integrity | Space Science |
| Data Rate Indicator | Space Science |
