Program source code written in the Racket language; may be used for various purposes, whether it be storing a Racket module that can perform a specific function and work with other RKT modules in order to act as a project or containing metadata that describes a package.

Racket is used in scripting, computer science education, research, and general-purpose programming. It is designed to provide capabilities beyond the Scheme and Lisp languages in which it is based. Some of its features include the ability to link components written in various dialects and libraries that support a variety of applications such as web servers and databases.