Purrorritt
Distinguished
My thought on the subject is semi-conductor RAM. I remember back in the day when 0.5 Megs of RAM cost you the space of about 3 file cabinets. That was for an IBM 360. Ten years later you could get 4M on a single 19" card (as for rack mount). These days you can't buy a 4M memory module. They just don't make them that small. And everything has RAM in it.