Here's a cool old video that I think RvH was the first to post on SH a couple of years ago. It's Seymour Cray discussing his company's supercomputers.
http://www.youtube.com/watch?v=xW7j2ipE2Ck#mce_temp_url#
You'll need a coffee, it's a long one, but it's worth a listen if you want to (partially) understand your investment