| rwo | MATLAB Output Data |
| rwpat | RockWorks Pattern Tables Data |
| rwrpt | RockWorks ReportWorks Data |
| rws | Open Workbench Sort Data |
| rws | REDIPlus Workspace |
| rws | RenderWare Stream Data |
| rws | Retina Wireless Scanner |
| rwv | Open Workbench View Data |
| rwx | Netscape Live 3D Data |
| rx | Borland Reflex Database Driver |
| rx1 | R:Base X.5 Database |
| rx2 | R:Base X.5 Database |
| rx3 | R:Base X.5 Database |
| rx4 | R:Base X.5 Database |
| rxa | Retro-X Animation Data |
| rxc | Reflection X Advantage Client Starter Data |
| rxd | Reflection X Advantage Definition Data |
| rxdoc | iZotope RX Document |
| rxf | Resco Explorer Encrypted File |
| rxh | Borland Reflex Database Help Data |
| rxm | Reflection X Advantage Multi-session Data |
| rxn | MDL Reaction Format Data |
| rxr | Borland Reflex Database Report Data |
| rxs | RSIGuard RSIScript Data |
| rxw | eXtendable Wad Editor RXW Data |
| rxx | Retrospect Selector Export Data |
| rzfl | YouTube Movie Maker Data |
| rzk | Red Zion Key |
| rzlayer | YouTube Movie Maker Layer Data |
| rzlrc | YouTube Movie Maker Lyrics Data |
