Kind of funny to consider those uses in audio production. You ‘master’ a recording for it to become authentic (before mastering it is not finished or taken legitimately) and of course ‘slave’ is everywhere in a recording studio signal chain, and leader tape is a strip of plastic in front of a reel.
Nothing really menacing there with either use, but once you consider how much these terms are passed around - giving authority to processes based on people being rulers over others - it’s oddly ubiquitous or subconscious seeming. More of a ‘huh’ moment than anything else, but worth talking about.
