There's a stack of blue books in one of the faculty prep rooms.
When I was in college, I played a fair bit of D&D (AD&D, to be absolutely accurate), and tended to use bluebooks to write dungeons in (little grids rock for making maps).
I can't help thinking of writing dungeons when I see bluebooks, still, to this day.
I hope students somewhere are still writing dungeons in bluebooks.
(Or should that be "geek nostalgia"?)