one of my professors doesn't teach from our textbook at all, and i swear he just makes stuff up sometimes. anyways, i was absent and apparently we talked about HAT architecture? well i couldn't find anything on the internet or our textbook about it and today on our test we had a question that referred to the "head and tail architecture". so i assume that's what HAT stood for yet even searching for that i can find nothing on the internet. i think whatever it is must have come to my professor in a dream yet he decided to put it on our test. does anyone have any clue what it is? p.s. the class is called advanced high-performance computer architecture or something like that.