| reg-auto | WOW! Diagnostic Registration Data |
| reget | ReGet Deluxe Downloader Data |
| regkey | Zoom Player Registration Key Data |
| reglnk | Windows Registry Editor Shortcut |
| regs | Netscape Navigator Registry Data |
| regularizer | SAM Transition Regularizer Data |
| rek | Fraunhofer EZRT Volume Data |
| rel | 3DCS Simulation Related List Data |
| rel | Act! Alarm Data |
| rel | my Knowledge Explorer Relation Data |
| rel | Nintendo Wii Relocatable Module |
| rel | Norton Internet Security Log |
| rel | PLINK Text Relationship Matrix |
| rem | Act! Database Maintenance Data |
| remotecodec | Reason Remote Codec Data |
| remotemap | Reason Remote Mapping Data |
| renderman | RenderMan Data |
| renv | Rhino 3D Saved Environment Data |
| rep | AAICWpro Autoresponder Data |
| rep | Act! Report Data |
| rep | Sphinx Responses Data |
| repeaks | REAPER Media Peak Data |
| repo | UEStudio Repository Data |
| repx | XtraReports Report Definition |
| req | Certificate Signing Request Data |
| req | FidoNet Request Data |
| res | 4D Database Client Resource Data |
| res | Abaqus/Standard Restart Data |
| res | Qualitek-4 Results Data |
| res | SHELX Chemical Model RES Data |
| res | Steam Client Resource Data |
| res | SWAT Reservoir Input Data |
| res11 | MIKE 11 DSF Results Data |
| resbuild | ResBuild Data |
| reso | HEADTAIL Resonator Data |
