| 41. | .rex | Add-on (ArchiCAD) ◊ Executable file (old format) (PharLab) ◊ Report definition (Oracle) ◊ Rexx language source code file (Rexx) |
| 42. | .rexx | Rexx language source code file (Rexx) |
| 43. | .rez | Resource file |
| 44. | .rf | Bitmap graphics (Raster file) ◊ Flash Clip (RealPlayer) |
| 45. | .rfm | Rich music format |
| 46. | .rft | DCA/RFT Revisable Format Text file (IBM DisplayWrite 4.0-5.1) |
| 47. | .rg | Bitmap graphics (1bit black and white or 4bit CMYK) (Raster Graphics format) |
| 48. | .rgb | Bitmap graphics (Irix RGB image format) ◊ Bitmap graphics (Raw red, green and blue bytes) |
| 49. | .rgba | Bitmap graphics (Raw red, green, blue and matte bytes) |
| 50. | .rgx | Symbol tables etc. info (ReaGeniX code generator) |
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