| Rapid Developing Thunderstorm | Academic & Science |
| Research Distinction Track | Academic & Science |
| Richard Toll | Airport Code |
| Reed Tool Company (delisted) | Business |
| Readers' Digest | Business |
| Remote Diagnostic Technologies, LTD | Business |
| Recombinant Dna (deoxyribonucleic Acid) Technology | Chemistry |
| Ruby Development Tools | Community |
| Rider Development Track | Community |
| Remote Development Tools | Community |
| Research Development Team | Community |
| Repertory Dance Theater | Community |
| Ruby Development Tool | Community |
| Repertory Dance Theatre | Community |
| Rwanda Development Trust | Community |
| Really Deep Thoughts | Community |
| Remote Data Terminal | Computer Hardware |
| Reference Data Technology | Computing |
| Remote Diagnostic Technologies | Computing |
| Robert Derector Telecommunications | Computing |
| Refrigeration Design Technologies | Computing |
| Resource Definition Table | Computing |
| Rapid Deployment Terminal | Computing |
| Restricted Data Transmission | Computing |
| Realnetworks Data Transport | Computing |
| Resource Director Technology | Computing |
| Referenced Data Transfer | Computing |
| Reverse Draw Technology | Computing |
| Rapid Deployment Template | Computing |
| Radiation Detection Technologies | Computing |
| Reliance Detection Technologies | Computing |
| Ridotto | Cryptocurrency |
| Rule Discovery Tool | General |
| Relationship Defining Talk | General |
| Rapid Diagnostic Test | General |
| Rapid Dry Time | General |
| Réseau de Développement Technologique | General |
| Reliable Della Transfer | General |
| Remote Deep Tank | General |
| Resin Device Toolbox | General |
| Report Date And Time | General |
| Real Data Transport | General |
| Radio Data Terminal | General |
| Reservoir Description Tool | General |
| Rock Deep Tread | General |
| Roadside Drug Testing | General |
| Regional Driver Trainer | General |
| Road Deflection Tester | General |
| Road Dog Trucking | General |
| Renault Duster Team | General |
| Road Dampening Technology | General |
| Renault Diesel Turbo | General |
| Retake Driving Test | General |
| Reaction Decoder Tool | General |
| Reliable Datagram Transport | General |
| Renewable Drive Tapping | General |
| Rare drop table | General |
| Read Date Time | General |
| Restricted Differential Tuition | General |
| Resource Dependence Theory | General |
| Ross Droplet Technique | General |
| Rural Density Transfer | General |
| Roush Diagnostic Tool | General |
| Relational Dialectics Theory | General |
| Real Displacement Textures | General |
| Rank Down Tickets | General |
| Radio Data Terminals | General |
| Rising Drug Tolerance | Governmental |
| Reliability Demonstration Test | Governmental |
| Real Donald Trump (: | Governmental |
| RAVTHA ROAD | Indian Railway Station |
| Rencontre Du Temps | Internet |
| Remaining Dentin Thickness | Medical |
| Retinal Damage Threshold | Medical |
| Registered Drama Therapist | Medical |
| Rapid Diagnostic Tests | Medical |
| Registered Dental Technologists | Medical |
| Rights Description Table | Military and Defence |
| Radio Digital Terminal | Military and Defence |
| Regional Decision Team | Military and Defence |
| Reserve Duty Training | Military and Defence |
| Research, Development, and Test | Military and Defence |
| Reliable Data Transfer | Networking |
| Resource Discovery Tool | Networking |
| Rollback- Dependency Trackability | Networking |
| Remote Distributed Testing | Networking |
| Richard- Toll, Senegal | Regional |
| Report Definition Table | Softwares |
| Reliability Demonstration Testing | Space Science |
| Rapid Decompression Test | Space Science |
| Remote Data Transmitter | Space Science |
| Random Drug Test | Sports |
| Right Defensive Tackle | Sports |
| Red Drum Tackle, Buxton, Nc | Sports |
| Rapid Dry Technology | Technology |
| Remote Digital Terminal | Telecommunication |
| Recall Dial Tone | Telecommunication |
