Earlier quoted context omitted.
In commercial radio, DJs haven't selected the music in 40 or more years. I used to show up for my shifts to find a printed playlist from a software product called Selector. I had to follow it.
There was that time I was tripping on acid at 2am and was offended by hearing the same Doobie Brothers song that plays during my drive in and my drive out and called up the college radio station thinking, "I'm either going to talk to the janitor or the program manager", turns out the program manager picks up the phone and I ask him, "Who picks this music out?" and he says "I do" and that it's programmed on the comput…
Maybe other colleges did it differently but we didn't have a program manager or anything. Everyone was free to do what they wanted outside of some FCC rules and what I previously mentioned.