I remember when I was a kid my father worked in Univac, they were really big back in 70s and 80s. I used to play Space Invaders and Pac-Man at my fathers work, and sometimes I got to go with him to the big computer room down in the basements. Those were huge mainframes with large tapes to save data to. Kida like old movies, big square machines, 5 feet tall but not the blinking lights. And the tapes like two big eyes on the front. That's how I rember them anyway. And the smell of the room, very clean but dusty. And extremely dry. They didn't want to get any water into those half a million machines. It's funny, my Pentium probably has more computerpower than that whole room full of mainframes.