EUREKA! Reading Scott Stevens' post regarding the FORTRAN decks, a bell suddenly rang inside my wee head. http://www.columbia.edu/acis/history/1965.html The 7090 had an accurate, mechanical TOD clock. I feel so clever now! ^_^ -tsb Please CC any replies to me (toresbe at ifi.uio.no) as my cctech digest is unreliable at best.