| Ext. | Description | Used by | |||
|---|---|---|---|---|---|
| R | Ratfor file | ||||
| R | Script file | R | |||
| R00, R01, ... | Part of a multi-file RAR archive | ||||
| R2D | Reflex 2 datafile | Reflex 2 | |||
| R3D | Red Raw Video (raw video data created with a Red camera) | Red Camera | |||
| R8 | Raw graphics file (one byte per pixel) plane one | PicLab | |||
| R8P | PCL 4 bitmap font file | Intellifont | |||
| RA | Remote Access conf. files | RA | |||
| RA0, RA1, ... | Part of a multi-file RAR archive | ||||
| RAD | 2-op FM music | Reality AdLib Tracker | |||
| RAD | Radiance | ||||
| RAL | Remote Access Language file | Remote Access | |||
| RAM | Ramfile | RealAudio | |||
| RAR | Archive | RAR | |||
| RAS | Graphics format | SUN Raster | |||
| RAT | Datafile (RATS) | ||||
| RAW | HSI raw graphic file | ||||
| RAW | PCM Signed Raw Sound File | ||||
| RAW | QRT graphic file | ||||
| RAY | Rayshade | ||||
| RB | Ruby Script file | ||||
| RBF | Datafile | Rbase | |||
| RBXM | ROBLOX "model" | ROBLOX | |||
| RBXL | ROBLOX "level" | ROBLOX | |||
| RC | Configuration file | emacs | |||
| RC | Resource Compiler script file | Microsoft C/C++, Borland C++ | |||
| RC | Resource Script | Resource Writer | |||
| RC | UUPC configuration files | UUPC | |||
| RC | Windows resource compiler script | RC.EXE -Resource WorkShop - OS/2 | |||
| RCG | Netscape newsgroup file (netsc.rcg) | ||||
| RData | Data file | R | |||
| RDF | Compiled UIC source code | Geoworks UI Compiler | |||
| RDI | Device-independent bitmap file (RIFF RDIB format) | ||||
| RDP | RDP connection | Remote Desktop connection | |||
| RDX | Datafile | Reflex | |||
| REC | Archivation protocol | ARCSERVE | |||
| REC | Datafile | EpiInfo | |||
| REC | Record file | Sprint | |||
| REC | Windows Recorder Macro File | WinRecorder | |||
| RED | Path info | Clarion Modula-2 | |||
| RED | REDuced nodelist file | T-Mail nodelist Compiler | |||
| REF | Cross-reference | ||||
| REG | OLE Registration file | Windows 3.x | |||
| REG | Registration information or key | ||||
| REL | Foreground job relocatable file | RT-11 | |||
| REM | Remarks definition | Sourcer | |||
| REM | Remarks | ||||
| REP | QWK reader reply file | ||||
| REP | Report file used by many applications | ||||
| REP | Report | Report Designer - CodeReporter - DataBoss | |||
| REQ | File request | FTN Software | |||
| RES | Compiled resource | Microsoft C/C++, Borland C++ | |||
| RES | DBASE resources | dBASE IV | |||
| RES | Windows compiled resource package | Win | |||
| REV | Revision file | Geoworks | |||
| REX | PharLab executable file (old format) | PharLab | |||
| REX | Report definition | Oracle | |||
| REX | Rexx language source file | Rexx | |||
| REZ | Resource file | ||||
| RF | Sun raster graphics file | ||||
| RFM | Report ForMat (script for customized report) | Nuverb Systems Inc: Donarius | |||
| RFT | DCA/RFT Revisable Format Text file | IBM DisplayWrite 4.0-5.1 | |||
| RGB | SGI RGB image file (RAW) | SDSC Image Tool | |||
| RGX | Symbol tables etc. info | ReaGeniX code generator | |||
| RH | Resource header file | Borland C++ 4.5 | |||
| RH | Windows resource file header | RC.EXE | |||
| RHistory | Command history logfile | R | |||
| RI | Data | Lotus 1-2-3 | |||
| RIB | Graphics (Renderman Interface Bytestream) | 3D Reality | |||
| RIC | Fax | Ricoh | |||
| RIF | RIFF bitmap graphics (Resource Interchange File Format) | Fractal Design Painter | |||
| RIP | TeleGrafix Remote Imaging Protocol | Maximus 3.0 | |||
| RIX | Graphics (ColoRIX Image File) | ColoRIX | |||
| RL4 | Bitmap graphics | ||||
| RL8 | Bitmap graphics | ||||
| RLA | Wavefront raster image file | SDSC Image Tool | |||
| RLB | Data hgw.rlb | Harvard Graphics Win | |||
| RLC | Graphics 1bit/pixel scanner output | ||||
| RLD | Norton Commander 5.0 temp file | NC 5.0 | |||
| RLD | OSIMapDef. RecLoad Definition | ||||
| RLE | Utah Run Length Encoded rasterfile graphic file | SDSC Image Tool | |||
| RLZ | REALIZER source code file | CA-Realizer | |||
| RM | RealMedia | RealPlayer | |||
| RMB | data | RegistryMaster | |||
| RMI | Windows alternate synthesized sound format | RIFF RMID format | |||
| RMK | Make file | CA Clipper - RMAKE | |||
| RMVB | RealMedia Variable Bitrate | RealPlayer | |||
| RN | XPL program for Nota Bene users | ||||
| RNA | lime Network Real Native Application File | All lime Network Applications | |||
| RND | Rendering Slide | AutoCAD AutoShade | |||
| Rnn | Multi volume RAR archive | RAR | |||
| RNO | Runoff file | VAX | |||
| ROL | FM music Adlib Music File | Roland | |||
| ROM | Read Only Memory image in emulators, AONs, etc. | ||||
| ROO | CODASYL DBMS Database Root | Oracle | |||
| RPB | Data report file used by CP Backup | CP Backup | |||
| RPD | Database | RapidFile | |||
| RPF | AutoCAD pattern | ACAD | |||
| RPL | Text document | Replica | |||
| RPM | Red Hat Package Manager | Red Hat Linux | |||
| RPT | Report file used by many applications | ||||
| RRD | Reduced Resolution Dataset | ESRI (GIS) | |||
| RS | Data file | Amiga Resource - Reassembler | |||
| RS | Rust language source | ||||
| RS_ | Resource fork of a Macintosh file | Mac-ette | |||
| RSC | Resource file | ViewMax - many | |||
| RSL | Application - Project | resolver one | |||
| RSL | Resource Library used by PC Tools for Windows | PC Tools - Win | |||
| RSP | Response file (text file containing input expected by e.g. LINK) | ||||
| RSP | Response File | OS/2 | |||
| RST | reStructuredText | Docutils | |||
| RSY | FLEXIT Multishot Survey Raw Data file | FLEXIT | |||
| RTF | Rich Text Format text file (help file script) | many - Microsoft Word | |||
| RTFD | RTF-Packet | NeXT | |||
| RTL | HP RTL graphic file | ||||
| RTL | Run-Time library | Norton Utilities | |||
| RTL | Text file | ||||
| RTP | RTPatch software update package data file | Pocket soft patch | |||
| RTS | Realizer executable file | ||||
| RTS | Runtime library file | CA-Realizer | |||
| RUL | Echo-conference rules | ||||
| RUN | PC Tools for Windows batch file | PC Tools | |||
| RUNZ | pseudo-executable file, used in Portable Apps and software installers for Super OS | RUNZ Framework | |||
| RUS | Russian text | ||||
| RV | Mobile pricelist data file | Mobile | |||
| RVF | TRichView | ||||
| RVW | Review | RV | Raw Wind Data | ||
| RWS | Borland Resource Workshop symbol file | Resource Workshop | |||
| RWS | Resource Workshop data file | Borland C++ | |||
| RWX | Criterion RenderWare | ||||
| RWX | MEME Shape File | ||||
| RWX | Script | RenderWare | |||
| RWZ | Microsoft Outlook Rules Wizard File | Microsoft Outlook | |||
| RXD | Reflex 1 datafile | Reflex 1 | |||
| RZK | File Crypt password file | All text editors | |||
| RZX | File Crypt encrypted file | File Crypt (Akte Krypta, Kriptirnik) |
Read more about this topic: List Of File Formats (alphabetical)