Has anybody here ever heard a relay machine running, like one of the early Zuse machines or the Harvard Mark-1? It occurred to me (please don't ridicule me too much for this*) that the sound of the robot in the old "Lost in Space" TV series may have been intended to sound like a relay machine. I've heard descriptions of them sounding like a thousand women knitting, which could sort-of describe that robot sound-effect as well... Cheers, Bill. * I guess you should ridicule me just the right amount. :-)