> In my wanderings, I ran across this interesting history of the quartz crystal industry. > http://www.ieee-uffc.org/fc_history/bottom.html > Colin Yes, and several dozen more like it are found at: http://www.ieee-uffc.org/fcmain.asp?view=history See also a intro set of time-nuts links at: http://www.leapsecond.com/time-nuts.htm /tvb