What does \"rc\" stand for?

[Chuck Collins]

OK, I know what "grep" stands for, and I even know about "dsw". Someone
asked me last week what the "rc" in .cshrc (and /etc/rc and .mailrc
and .exrc etc.) and I didn't know.

If anyone else has any favorite obscure acronyms (preferably with etymology)
mail then to me and I'll post the collection.

Chuck Collins                 cpc at ames-nas       {ihnp4,hplabs}!ames!amelia!cpc