| rrg | JRiver Media Center License File |
| rro | Risk Reduction Overview Data |
| rrp | Running Time Logger Profile |
| rrp | Rhythm Rascal Project |
| rrpp | Oracle Reports Remote Printing Utility Data |
| rrq | SDLX Registration Request Data |
| rrr | Registry Mechanic Backup |
| rrt | Rhapzode Resource Template |
| rrx | IBM Datacap Defines Data |
| rrx | Moxy Variable Rate Securities Data |
| rs8 | ProSource Data |
| rsd | RuneScape Demon Data |
| rsd | Resort Software Database |
| rsdb | Resort Software Database |
| rsdf | RapidShare Downloader Format File |
| rsdo | Reflection Desktop Customization Rules |
| rsds | Report Server Data Source |
| rse | RockSim Engine Database |
| rsed | ResEdit Data |
| rsf | WAsP Resource Data |
| rsm | CCNA Network Visualizer Data |
| rsmap | RSTuner RSMap Data |
| rsr | Poser Model Preview |
| rst | ANSYS Results Data |
| rstm | eXtendable Wad Editor RSTM Data |
| rstp | ANSYS Results Data |
| rsu | OS/2 Warp Remote Software Update |
| rsu | IBIS-TRAD RAW Data |
| rsw | R&R ReportWorks SQL Report Writer Report |
| rsx | IBIS-TRAD RAW Data |
