It is a common technology and automotive term. "Master" and "slave" hard drives. Master and slave clutch and brake components. Master and slave in computer code parlance is very common.
All of it, on the chopping block and many MASSIVE companies are now bending over backwards to eliminate the terminology from their training, documentation, and culture. I chit you not.
I bet no one here ever, EVER thought speaking in those terms as racist or derogatory.
If the Redskins have to change their name, I'd suggest the '49ers need to as well. Westward expansion, you know. Dallas Cowboys: Cowboys and indians! Atlanta Braves, Cleveland Indians, Texas Rangers, Chicago Blackhawks, Columbus Blue Jackets.... Denver University Pioneers.... It goes on and on.
If it starts, where does it end?
