The *.rcs file extension is related to the RAD Developer an integrated development environment. The RCS file contains color scheme settings.
RCS file extension - RAD Developer color scheme
What is rcs file? How to open rcs files?
File type specification:
The RCS file extension is associated with the RAD Developer. The *.rcs file contains color scheme.
RAD Developer is an integrated development environment (including a fast and easy to use built in debugger) for your PowerBASIC compiler. With the RAD Developer IDE you can develop your applications faster and more efficiently than ever before. RAD Developer creates a highly automated and customizable environment for application design.