USC means one of two things
"According to boffins from Northeastern University, the University of Southern Carolina, and tech accountability non-profit Upturn ..."
I know that USC can refer to one of two American universities, but they are the University of Southern California and the University of South Carolina. They haven't gotten around to making the University of South California or the University of Southern Carolina yet, but I'm sure they will in order to make the acronym even harder to understand. For now, from the paper, let's properly credit the University of Southern California for the work they did.