Not sure if there’s a name for this, but my favourite example is settling on UTC as the acronym for Coordinated Universal Time:
https://en.m.wikipedia.org/wiki/Coordinated_Universal_Time#E...
https://en.m.wikipedia.org/wiki/Coordinated_Universal_Time#E...
You see this word in many English roots, such as isotropic, isometric, isomer, etc.
But I'd tend to call BS - if it wasn't ever an acronym, why capitalize all three letters?
The google ngrams are also suggestive:
https://books.google.com/ngrams/graph?content=international+...