Looks like a 1970s military interface. With cards that you overlay on the controller for different sports, but the schools, etc.. lose the cards.
So many operations require strange & confusing sequences of button presses.
At least with basketball professional referees often understand the UI well and can help out in a pinch, but these things are really really hard for volunteers to figure out.
There are some newer ones that are self contained where the computer & scoreboard are integrated and sit on the desk with the scorers and timekeeper. Those have the lovely design that the horn/buzzer is right in the unit and it blows everyone's ears out when it goes off.