I don't find it at all surprising that there would be a large crossover between amateur radio and this list. I got involved with electronics and radio before computers were affordable for personal work. I got my novice ticket in 1972, but let it languish and sold off my Heathkit equipment over the years. With the removal of Morse code requirements and web sites like www.qrz.com I got my General class ticket a little over a year ago. I only had to study up on the some recent stuff and dust off some old neurons. Dave. W1MMX