Marling, of course you are not old! I am middle aged, 54, that ,means I am obligated to live to be 108, I just hope I can stop working a few years before then. I was never "good" at morse code, I got up to about 5 words per minute, I think, and forgot everything but SOS ... --- ... !I use my sliderule all the time, to beat on my old Heathkit electonic calculator, that I built about 25 years ago, and it is still accurate, but the display tubes loosen up and I whack it! I really don't use the sliderule to beat on it, it mught crack the plastic case! :-)Ken B