- main; principal. "the apartment's master bathroom has a free-standing oval bathtub"
Because it's a master bedroom everyone understands and feels FINE that this is okay. EVEN in a master/slave hard drive setup (this adds a new meaning too) it isn't about subjugating disk drives, it's about slavishly copying another master (main, principal) disk. I'm very sorry if you're offended by words being used for very specific technology purposes but it isn't right that everyone has to conform to your way of seeing the world.
EDIT: damn, glad to see that article has been flagged and at this point I'm so happy that hacker news does not allow politics.