File extensions that begin with R.
Ext. Type of file
R3D Redcode Raw video image
R3D Realsoft 3D image
R8P LaserJet portrait font
R8L LaserJet landscape font
RA RealAudio
RAM RealAudio playlist
RAR RAR archive
RAS Sun bitmap
RAT Content ratings
RAW Uncompressed digital camera image
RAW Uncompressed data (many formats)
RAW 3D file (open standard)
RC Resource script
RDF RDF metadata
RDFS RDF schema
REC Recorder
REG Windows Registry keys
RES Programming resource
RFN RoboForm note
RFP RoboForm Passcard
RFT DCA/RFT document
RFT RoboForm identity
RGB SGI bitmap
RIA Alpharel Group IV bitmap
RIB Renderman graphics
RIC Roch FaxNet
RIX RIX virtual screen
RLC CAD Overlay ESP (Image Systems)
RLE Compressed (run length encoded)
RLF RichLink compiled format
RM RealMedia (RealAudio/RealVideo)
RMI MIDI music
RMM RealMedia
RMVB RealMedia VBR
RND AutoShade rendering format
RNL GTX Runlength bitmap
RP RealPix
RT RealText
RTF Microsoft text/graphics
RV RealVideo