| rpf | CARE-S InfoWorks Runoff Parameters Data |
| rpk | Rail Simulator Package |
| rpk | RadLight Media Player Skin |
| rpr | ArchiCAD Roof Properties |
| rpt | BI/Query Report Specification |
| rpt | Crystal Reports Report |
| rptdesign | Actuate BiRT Report Design |
| rptlibrary | Actuate BiRT Report Library |
| rpv | RealPlayer Visualization |
| rpx | Laservault Backup Index File |
| rpz | Crystal Reports Compressed Report |
| rq | SPARQL Query |
| rqb | Sybase PowerDesigner Requirements Model Backup |
| rql | RequisitePro Database Information File |
| rqm | Sybase PowerDesigner Requirements Model |
| rqns | Universal Pokemon Randomizer Data |
| rra | vRigger Rigging Gear |
| rrd | RRDtool Round Robin Database |
| rrd | WAsP Roughness Description |
| rrg | JRiver Media Center License File |
| rrp | Running Time Logger Profile |
| rrp | Rhythm Rascal Project |
| rrpp | Oracle Reports Remote Printing Utility Data |
| rrr | Registry Mechanic Backup |
| rrt | Rhapzode Resource Template |
| rrx | IBM Datacap Defines Data |
| rs8 | ProSource Data |
| rsd | RuneScape Demon Data |
| rsd | Resort Software Database |
| rsdb | Resort Software Database |
