978
Might not even have to change the acronym
(lemmy.world)
People tweeting stuff. We allow tweets from anyone.
RULES:
I did some research, and apparently, "United States" without "of America" could be a kind of ellipsis. But more likely, it's just an alternative country name. So I think that makes US an initialism (because you pronounce it as [yu-es]) for an alt (bonus info: this is a final clipping, or apocope, of "alternative") name.
Linguistics is such a dirt hut...