Phrases like click-through rate can seem like another case of “black box syndrome-” the feeling that internet marketing is an incomprehensible mystery to businesses who don’t have an entire IT department.
The black box on an aircraft is actually bright orange, so why the misnomer? There's no ironic or clever
story to it, simply that in the early 1950's, rudimentary flight data recorders were actually housed in a metal box onboard the airplane that was painted… black. Aircrews, whose job it was to keep the machine flying, referred to it as "the black box" as a way of indicating that it did something electronic and mysterious.