| Endung | Registry-Eintrag | Anwendung (Standard) |
| .r00 | WinRAR | Winrar |
| .r* | WinRAR | Winrar |
| .ra | RealPlayer.RA.6 | Real Player |
| .rar | WinRAR | Winrar |
| .RDP | RDP.datei | |
| .reg | regdatei | |
| .rev | WinRAR.REV | Winrar |
| .rf | RealPlayer.Flash.6 | Real Player |
| .rjs | RealJukebox.RJS.1 | Real Jukebox |
| .rle | image | MICROSOFT Internet Explorer |
| .rm | RealPlayer.RM.6 | Real Player |
| .rmf | rmfdatei | |
| .rmi | audio wmplayer.exe | MICROSOFT Mediaplayer |
| .rmm | RealPlayer.RAM.6 | Real Player |
| .rmp | RealJukebox.RMP.1 | Real Jukebox |
| .rms | RealPlayer.RMS.6 | Real Player |
| .rmx | RealJukebox.RMX.1 | Real Jukebox |
| .rnk | rnkdatei | |
| .rnx | RealPlayer.RP.6 | Real Player |
| .rp | RealPlayer.PIX.6 | Real Player |
| .rpm | audio/x-pn-realaudio-plugin | Real Player |
| .rqy | rqydatei | |
| .rsml | RealPlayer.RSML.6 | Real Player |
| .rt | RealPlayer.RT.6 | Real Player |
| .rtf | Word.RTF.8 | MICROSOFT Word |
| .rv | RealPlayer.RV.6 | Real Player |
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