| rat | Microsoft Windows Rating System Data |
| rat | Nimbus 7 SAMS CRAT File |
| rat | PICS Service Description |
| rav | Easy Timesheets Data |
| rav | Rising Antivirus Quickscan Data |
| raw | 3DCS Simulation RAW Data |
| raw | Bruker RAW Data |
| raw | Nimbus 7 SAMS Raw Data |
| raw | PLINK Additive and Dominant Component Data |
| raw | Sentry 2020 Encryption Data |
| raw8 | Avantes Avasoft v8 Scope Mode Data |
| rawpkt | Colasoft Capsa Capture Data |
| ray | Altair FEKO POSTFEKO Rays Data |
| ra_ | Resco Photo Viewer Thumbnail Cache |
| rb | SketchUp Plugin Script |
| rb0 | Trend Micro AntiVirus Backup Data |
| rb1 | R:Base v4.5 Database |
| rb1 | Trend Micro AntiVirus Backup Data |
| rb2 | R:Base v4.5 Database |
| rb2 | Trend Micro AntiVirus Backup Data |
| rb3 | R:Base v4.5 Database |
| rb3 | Trend Micro AntiVirus Backup Data |
| rb4 | R:Base v4.5 Database |
| rb4 | Trend Micro AntiVirus Backup Data |
| rba | RegexBuddy Action Data |
| rbb | Top Secret Crypto Gold Random Bits Data |
| rbc | Retrospect Backup Catalog |
| rbd | DVD Rebuilder Data |
| rbf | Altera Quartus II RAW Binary Data |
| rbf | Altera Raw Binary File |
