For the meaning of
rc you have probably seen:
- run commands
- resource control
- run control
- runtime configuration
I’d like to go with
runcom since as seen in this source: Unix faqs:
rc (as in “.cshrc” or “/etc/rc”) = “RunCom”
“rc” derives from “runcom”, from the MIT CTSS system, ca. 1965.
‘There was a facility that would execute a bunch of commands stored in a file; it was called “runcom” for “run commands”, and the file began to be called “a runcom.”
“rc” in Unix is a fossil from that usage.’
— Brian Kernighan & Dennis Ritchie, as told to Vicki Brown
 The ‘rc’ suffix goes back to Unix’s grandparent, CTSS. It had a command-script feature called “runcom”. Early Unixes used ‘rc’ for the name of the operating system’s boot script, as a tribute to CTSS runcom.
So my mind is set to