| 1 | R | Apple | Rez Source Code Format |
| 2 | R00 | RARLAB | WinRAR Compressed Archive |
| 3 | R01 | RARLAB | WinRAR Split Archive Part 1 |
| 4 | R02 | RARLAB | WinRAR Split Archive Part 2 |
| 5 | R03 | RARLAB | WinRAR Split Archive Part 3 |
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| 6 | R04 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 6) |
| 7 | R05 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 7) |
| 8 | R06 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 8) |
| 9 | R07 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 9) |
| 10 | R08 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 10) |
| 11 | R09 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 11) |
| 12 | R10 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 12) |
| 13 | R11 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 13) |
| 14 | R12 | Symantec Corporation | Norton Ghost Rar |
| 15 | R13 | Symantec Corporation | Norton Ghost Rar |
| 16 | R14 | Symantec Corporation | Norton Ghost Rar |
| 17 | R15 | Symantec Corporation | Norton Ghost Rar |
| 18 | R16 | Symantec Corporation | Norton Ghost Rar |
| 19 | R17 | Symantec Corporation | Norton Ghost Rar |
| 20 | R18 | Symantec Corporation | Norton Ghost Rar |
| 21 | R19 | Symantec Corporation | Norton Ghost Rar |
| 22 | R20 | Symantec Corporation | Norton Ghost Rar |
| 23 | R21 | Eugene Roshal | WinRAR Split Archive Part 21 |
| 24 | R22 | Symantec Corporation | Norton Ghost Rar |
| 25 | R23 | Symantec Corporation | Norton Ghost Rar |
| 26 | R24 | Symantec Corporation | Norton Ghost Rar |
| 27 | R25 | Symantec Corporation | Norton Ghost Rar |
| 28 | R26 | Symantec Corporation | Norton Ghost Rar |
| 29 | R27 | N/A | Norton Ghost Rar |
| 30 | R28 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 30) |
| 31 | R29 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 31) |
| 32 | R30 | Eugene Roshal | WinRAR Split Archive Part 30 |
| 33 | R31 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 33) |
| 34 | R32 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 34) |
| 35 | R33 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 35) |
| 36 | R34 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 36) |
| 37 | R35 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 37) |
| 38 | R36 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 38) |
| 39 | R37 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 39) |
| 40 | R38 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 40) |
| 41 | R39 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 41) |
| 42 | R3D | RED | REDCODE Video Format |
| 43 | R40 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 42) |
| 44 | R41 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 43) |
| 45 | R42 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 44) |
| 46 | R43 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 45) |
| 47 | R44 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 46) |
| 48 | R45 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 47) |
| 49 | R46 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 48) |
| 50 | R47 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 49) |
| 51 | R48 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 50) |
| 52 | R49 | Eugene Roshal | Split Multi-volume RAR Compressed Format Archive (part 51) |
| 53 | R51 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 54 | R52 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 55 | R53 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 56 | R54 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 57 | R55 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 58 | R56 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 59 | R57 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 60 | R58 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 61 | R59 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 62 | R60 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 63 | R61 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 64 | R62 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 65 | R63 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 66 | R64 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 67 | R65 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 68 | R66 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 69 | R67 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 70 | R68 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 71 | R69 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 72 | R70 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 73 | R71 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 74 | R72 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 75 | R73 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 76 | R74 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 77 | R75 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 78 | R76 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 79 | R77 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 80 | R78 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 81 | R79 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 82 | R80 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 83 | R81 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 84 | R89 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 85 | R90 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 86 | R95 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 87 | R96 | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 88 | R98 | N/A | RAR Compressed Formats From A Multi-volume Archive |
| 89 | RA | RealNetworks | Real Audio Format |
| 90 | RADIUS | N/A | Ruby-Radius Scipt |
| 91 | RAF | Fuji | Fuji RAW Image Format |
| 92 | RAKE | Ruby community | Ruby Makefile |
| 93 | RAKEFILE | Ruby community | Ruby Makefile |
| 94 | RAM | RealNetworks | Real Audio Metadata Format |
| 95 | RAPC | BlackBerry (Research In Motion Limited) | Java 2 ME Unit |
| 96 | RAR | Eugene Roshal | WinRAR Compressed Archive |
| 97 | RAR1 | N/A | RAR Archive |
| 98 | RAR5 | RARLAB | WinRAR Compressed Archive |
| 99 | RAS | Sun Microsystems | Sun Raster Graphic |
| 100 | RAST | N/A | Sun Raster Bitmap Image |
| 101 | RATDVD | ACE GmbH | RatDVD Disk Image |
| 102 | RAW | N/A | Raw Image Data Format |
| 103 | RAX | RealNetworks | Real Music Store Audio Format |
| 104 | RB | N/A | Ruby Source Code |
| 105 | RBF | Microsoft | Windows Installer Rollback Format |
| 106 | RBP | REAL Software | Real Studio Project Format |
| 107 | RBS | Propellerhead Software | Rebirth Song Format |
| 108 | RBW | N/A | Ruby |
| 109 | RBZ | Intersystem Concepts, Inc. | Rail Baron Player Saved Game Format |
| 110 | RC | Microsoft | Resource Script |
| 111 | RC1 | Samsung | Samsung Mobile Device Firmware Format |
| 112 | RC2 | Microsoft | Visual Studio Resources Format |
| 113 | RCC | Autodesk | Recap Compressed Structured Scan Data File |
| 114 | RCF | SonicWALL | Prototype Game Format |
| 115 | RCPROJECT | Apple, Inc. | Apple IMovie Project Format |
| 116 | RCY | Propellerhead Software | ReCycle 1.x Document |
| 117 | RDA | The R Project for Statistical Computing | R Data Format |
| 118 | RDAT | N/A | RNA Data (RDAT) |
| 119 | RDD | ReliaSoft Corporation | ALTA |
| 120 | RDF | N/A | Resource Description Framework Format |
| 121 | RDL | Corel Corporation | Corel Paradox Format |
| 122 | RDOC | James Britt | RubyDoc Script |
| 123 | RDP | Microsoft | Remote Desktop Configuration Format |
| 124 | RE | N/A | Python Regular Expressions Source Code |
| 125 | README | N/A | Readme Format |
| 126 | REAL | The GNOME Project | Gnome Desktop |
| 127 | REC | Topfield | Topfield PVR Recording |
| 128 | REF | Microsoft | Microsoft Train Simulator Reference Format |
| 129 | REG | Microsoft | Registry Format |
| 130 | REGTRANS-MS | Microsoft | Registry Transaction Log Format |
| 131 | REJ | N/A | Mercurial Reject |
| 132 | RELS | Microsoft | Open Office XML Relationships Format |
| 133 | REP | SAP AG | BusinessObjects Report Format |
| 134 | REPATCH | Propellerhead Software AB | Reason DCAM EnvShaper Effect Preset |
| 135 | REPORT | N/A | GENSCAN output results |
| 136 | RESJSON | Microsoft | Windows JavaScript Resources Format |
| 137 | RESMONCFG | Microsoft | Resource Monitor Configuration Format |
| 138 | RESP | Microsoft Corporation | Microsoft Windows Report Log |
| 139 | RESS | Unity Technologies | Unity 3D Model Archive |
| 140 | REST | N/A | ReStructuredText |
| 141 | RESW | Microsoft | Windows Resources Format |
| 142 | RESX | Microsoft | .NET Managed Resources Format |
| 143 | REV | RARLAB | RAR Recovery Volume Set |
| 144 | REX | Propellerhead Software | ReCycle Loop Format |
| 145 | REZ | Monolith | Lithtech Game Engine Resource Format |
| 146 | RF5 | Tektronix, Inc. | Tektronix |
| 147 | RFA | Autodesk | Revit Family Format |
| 148 | RFB | Siber Systems | RoboForm Bookmark Format |
| 149 | RFC | Siber Systems | RoboForm Contact Format |
| 150 | RFF | N/A | Build Engine RFF encrypted container |
| 151 | RFN | Siber Systems | RoboForm Safenote Format |
| 152 | RFO | Siber Systems | RoboForm Option Format |
| 153 | RFP | Siber Systems | RoboForm Passcard Format |
| 154 | RFQ | Siber Systems | RoboForm SearchCard Format |
| 155 | RFR | Adobe Systems Incorporated | Adobe Photoshop Frame Filter |
| 156 | RFX | Siber Systems, Inc. | RoboForm Blocked Passcard |
| 157 | RGB | SGI | RGB Bitmap |
| 158 | RGBA | SGI | Silicon Graphics Image Format |
| 159 | RGBE | N/A | Radiance Map |
| 160 | RGE | Microsoft | Entourage Format Archive |
| 161 | RGM | Relic Entertainment Inc. | Essence Game Engine Model |
| 162 | RGRP | Avid Technology | Pro Tools Region Group Format |
| 163 | RH | Microsoft Corporation | C++ Resource Header |
| 164 | RHK | N/A | Backdoor.Win32.Rbot.rhk Trojan Virus |
| 165 | RHTML | N/A | Ruby HTML Web Page |
| 166 | RIB | N/A | Renderman RIB |
| 167 | RIFF | Corel | Painter Raster Image |
| 168 | RIS | Research Information Systems | Research Information Systems Citation Format |
| 169 | RJS | RealNetworks | Ruby Javascript Format |
| 170 | RLA | N/A | Alias/Wavefront Bitmap Image |
| 171 | RLE | N/A | Run Length Encoded Bitmap |
| 172 | RLG | ReliaSoft Corporation | Weibull++ |
| 173 | RM | RealNetworks | Real Media Format |
| 174 | RMA | RealNetworks, Inc. | RealMedia Audio |
| 175 | RMDP | Microsoft Studios | Alan Wake Game Data |
| 176 | RME | SQUARE ENIX CO. | Final Fantasy Audio |
| 177 | RML | Autodesk | Redline Markup Language Format |
| 178 | RMP | RealNetworks | RealPlayer Metadata Package Format |
| 179 | RMVB | RealNetworks | RealMedia Variable Bit Rate Format |
| 180 | ROL | N/A | Ad Lib Synthesized Instrument |
| 181 | ROM | N/A | N64 Game ROM Format |
| 182 | ROO | N/A | WinRAR Archive |
| 183 | ROP | N/A | Generic |
| 184 | ROR | N/A | ROR Structured Feed |
| 185 | RP9 | Cloanto | RetroPlatform Disk Image Archive |
| 186 | RPKG | IO Interactive | Hitman Game Patch Archive |
| 187 | RPLN | Adobe Systems Incorporated | Adobe InDesign Required Function Library |
| 188 | RPM | Red Hat | Red Hat Package Manager Format |
| 189 | RPMNEW | Red Hat | Red Hat Package New Default Configuration |
| 190 | RPMORIG | N/A | RPM Package Manager package backup |
| 191 | RPMSAVE | Red hat | Red Hat Package Saved Configuration |
| 192 | RPMSG | Microsoft | Outlook Restricted Permission Message |
| 193 | RPROFILE | N/A | Quick-R R Programming Language Configuration |
| 194 | RPROJ | The R Project for Statistical Computing | R Project |
| 195 | RPT | SAP | Crystal Reports Format |
| 196 | RPY | Team Shanghai Alice | Python Script |
| 197 | RPYM | N/A | RenPy Module |
| 198 | RQY | Microsoft Corporation | Microsoft Excel OLE DB Query |
| 199 | RRC | BlackBerry (Research In Motion Limited) | BlackBerry Java Resource Content |
| 200 | RRH | BlackBerry (Research In Motion Limited) | BlackBerry Resource Header |
| 201 | RRPA | Oracle Corporation | Oracle Reports Remote Printing Utility PDF Report |
| 202 | RSA | N/A | RSA Certificate Format |
| 203 | RSB | Ubisoft Entertainment | Red Storm Bitmap Format |
| 204 | RSC | Nokia | Resource Format |
| 205 | RSD | REAL | RealSQLDatabase Format |
| 206 | RSDF | RapidShare | RapidShare Download Format |
| 207 | RSDS | N/A | SharePoint Shared Data Source |
| 208 | RSL | N/A | Robot Scripting Language |
| 209 | RSP | Microsoft | Linker Response Format |
| 210 | RSRC | Apple | Macintosh Resource Format |
| 211 | RSRS | Magic Modules Pty Ltd | Buddy API |
| 212 | RSS | N/A | Rich Site Summary |
| 213 | RT | RealNetworks | RealText Streaming Text Format |
| 214 | RT2 | Des & Lorraine Newman | OziExplorerCE Route |
| 215 | RTC | Autodesk | AutoCAD Civil Rating Curve Data Format |
| 216 | RTE | N/A | OziExplorer Route Format |
| 217 | RTF | Microsoft | Rich Text Format |
| 218 | RTFD | Apple | Rich Text Format Directory Format |
| 219 | RTF_ | N/A | Rich text format file - Mac File Type |
| 220 | RTG | Autodesk, Inc. | Autodesk Maya 3D Scene Data |
| 221 | RTL | HP | Text |
| 222 | RTML | N/A | Runeberg Text Markup Language document |
| 223 | RTP | Microsoft | Microsoft Software Update Format |
| 224 | RTTTL | Nokia Corporation | RTTTL / Nokring Mobile Ring-tone Format |
| 225 | RTWSH | RapidSolution Software | Radiotracker Wishlist Format |
| 226 | RU | N/A | Java Russian Font Properties Format |
| 227 | RUB | The jQuery Foundation | JQuery Rules |
| 228 | RUL | Flexera Software | InstallShield Rules Format |
| 229 | RUN | N/A | Linux Executable Format |
| 230 | RUS | GPS Moldova | Navitel Navigator Map |
| 231 | RV | RealNetworks | Real Video Format |
| 232 | RVDATA | Enterbrain | RPG Maker VX Data Format |
| 233 | RVF | Sergey Tkachenko | RichView Document |
| 234 | RVI | Eidos Interactive Ltd. | Revenant Game Archive |
| 235 | RVM | Eidos Interactive Ltd. | Revenant Game Archive |
| 236 | RVT | Autodesk | Revit Project Format |
| 237 | RW2 | Panasonic | Panasonic RAW Image |
| 238 | RWL | Leica | Leica RAW Image |
| 239 | RWM | Microsoft Corporation | Windows Imaging Resource Only |
| 240 | RWS | Embarcadero Technologies, Inc. | Borland C++ Resource Workshop Symbol Format |
| 241 | RWZ | Microsoft | Outlook Rules Wizard Format |
| 242 | RX | Microsoft Corporation | MS-DOS 7 |
| 243 | RX2 | Propellerhead Software | REX2 Audio Format |
| 244 | RX3 | Electronic Arts, Inc. | FIFA 11 Texture |
| 245 | RXML | Roxen Internet Software AB | Roxen Macro Language |
| 246 | RXPROJ | Enterbrain, Inc. | RPG Maker Project |
| 247 | RXX | Eugene Roshal | RAR Compressed Formats From A Multi-volume Archive |
| 248 | RZB | Red Zion | Red Zion Book Format |
| 249 | RZN | Red Zion | Red Zion Notes Format |
| 250 | RZP | N/A | Generic |
| 251 | RZR | N/A | Renamed WinRAR Archive |
