Resource script (Micosoft C/C++)
RC is a resource file format used by C/C++ programming applications. RC files are used to hold statements for different files that are going to be compiled into a binary resource file. RC files usually contain IDs for the files, parameters, and sometimes icons or bitmaps.
Learn more about .RC files:
Check out this cheat sheet for C, C# and C++.
Search on IT Knowledge Exchange for .RC-related questions.