R file extension

This is a sound file with the right channel of an audio track. It is usually exported by such audio production applications as Digital Performer (for Mac OS) and Cubase (for both Mac OS and Windows).

Ratfor (preprocessor for the FORTRAN programming language) file with regular FORTRAN source code and Ratfor statements that may be translated into FORTRAN source code before compiling with a FORTRAN compiler. Ratfor source code enables developers to use a wider syntax than the syntax supported by the FORTRAN compiler.

Created using the REBOL programming language script file with code that may be compiled into an executable application. It can be an application file or a header file referenced by other REBOL application files. REBOL means "Relative Expression Based Object Language" and is mainly used to generate Internet scripts and programs.

Rez (Mac OS X programs resource compiler) text file with declarations for program resources, such as string lists, icons, alerts or other types of resources. It is used to build the resources into the resource fork of a program file. R files store the type declarations and the resource specifications needed for compiling the resources. DeRez utility can be used bor decompiling compiled resources back into R files. Apple Xcode development program include the Rez compiler.

Generated using R (programming language that is used for statistical analysis and graphing purposes) script file with code that may be run using the R program environment. It can include commands for generating objects (functions, values and others) and creating visualizations of the computed information. The R Project for Statistical Computing developed R.