I attended/am attending one of the top 20 schools for my area of focus that aren't included in the aforementioned lists (for example, computer science rankings

I attended/am attending one of the top 20 schools for my area of focus that aren't included in the aforementioned lists (for example, computer science rankings http://www.usnews.com/education/worlds-best-universities-rankings/best-universities-computer-science) -- this includes CMU, which apparently didn't crack the top 20.