| rrp | Vflo Precipitation 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 |
| rrrx | Rhapzode Compiled Output |
| rrt | Rhapzode Resource Template |
| rrw | Goldmine Report Writer Data |
| rrx | IBM Datacap Defines Data |
| rrx | Moxy Variable Rate Securities Data |
| rs7 | LightTools Radiant Source Model Data |
| rs8 | ProSource Data |
| rsd | Resort Software Database |
| rsd | RadioSure Stations Data |
| rsd | RuneScape Demon Data |
| rsdb | Resort Software Database |
| rsdf | RapidShare Downloader Format File |
| rsdo | Reflection Desktop Customization Rules |
| rsds | Report Server Data Source |
| rsdx | RadioSure Stations Data |
| rse | RockSim Engine Database |
| rsed | ResEdit Data |
| rsf | WAsP Resource Data |
| rsf | Reflection Desktop Settings Data |
| rsfx | Reflection Desktop Data |
| rsm | CCNA Network Visualizer Data |
| rsmap | RSTuner RSMap Data |
| rsnp | RegSnap Data |
| rsr | Poser Model Preview |
| rsr | 4D Database for Mac Plug-in |
| rst | ANSYS Results Data |
| rstm | eXtendable Wad Editor RSTM Data |
| rstp | ANSYS Results Data |
| rstyle | pCon.planner Render Style Data |