That's a wonderful list! I'm sure he'd be interested in many of these. I took a look at the ROM's web page and even the architecture alone seems worth a visit. (He is, indeed, a student.)
You mentioned retro-gaming, which would interest him. He's very interested in computer history in general, and he has an eclectic collection of old computers (of all architectures), plus handhelds and calculators and miscellaneous gadgets.