By Charles Knell When I was a little kid, my parents bought a Zenith console television, which was manufactured in Chicago. It included an AM/FM radio and phonograph, and everything was mounted in a gorgeous dark brown wood cabinet. The television could receive channels 2, 5, 7, 9, 11, and sometimes 13. Yes, it could…

By Charles Knell – Above is a picture of a slide rule. This is what engineers and scientists used before electronic calculators were invented. In 1969, many of the calculations required to land men on the moon were performed on these. I used one in high school chemistry, physics and when I attended engineering college. You…