R Pegasus Mail Resource File (David Harris)
R Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
R Progress Database Compiled Program File (Progress Software Corporation)
R00 WinRAR Split Compressed Archive (RarLab)
R01 MicroStation Modification Resource (Bentley Systems, Incorporated)
R01 WinRAR Split Compressed Archive (RarLab)
R02 WinRAR Split Compressed Archive (RarLab)
R03 WinRAR Split Compressed Archive (RarLab)
R04 WinRAR Split Compressed Archive (RarLab)
R05 WinRAR Split Compressed Archive (RarLab)
R06 WinRAR Split Compressed Archive (RarLab)
R07 WinRAR Split Compressed Archive (RarLab)
R08 TaxCalc Tax File (Acorah Software Products Ltd.)
R08 WinRAR Split Compressed Archive (RarLab)
R09 WinRAR Split Compressed Archive (RarLab)
R1A Yamaha RM1x Dance-Music Workstation (Yamaha Corporation of America)
R1M RealOne Metadata Package (RealNetworks)
R1W Reflection Setting File (WRQ)
R2A Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America)
R2A RS7000 All Data (Yahama Corporation)
R2D Reflex Ver. 2 Data File (Borland Software Corporation)
R2D RISA-2D Simple Analysis & Design
R2K Repertoire 2000 Music Database
R2P RS7000 Pattern Data (Yahama Corporation)
R2P Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America)
R2S RS7000 Song Data (Yahama Corporation)
R2W Reflection Setting File (WRQ)
R36 Recomposer MIDI Sequencer Music File
R3A Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America)
R3A RS7000 Sample Data (Yahama Corporation)
R3D RISA-3D 3D Analysis & Design
R3D Redcode Raw Video Image File (RED Digital Cinema Camera Company)
R3D Realsoft 3D Image (Realsoft Graphics Oy)
R3D Raider3D Image File (OKYZ SA)
R3P RS7000 Sample Data (Yahama Corporation)
R3P Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America)
R4W Reflection Setting File (WRQ)
R5 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
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