People were using metric words for binary numbers since at least the late 1950s: https://en.wikipedia.org/wiki/Timeline_of_binary_prefixes#19...

Which doesn't make it more correct, of course, even through I strongly believe believe that it is (where appropriate for things like memory sizes). Just saying, it goes much further back than 1984.

It means it existed before modern SI, so it was SI that appropriated the wrong definition :)