High school equivalent, blue collar all my life, retired and finally free to dig into things that I've been curious about or that freshly stir my interest, found this site while looking for an answer and It is a terrific site. At first I was too intimidated to sign up because it is clear that there are a lot of highly educated and high IQ types on this site. I wondered if folks might not want to deal with someone at my level. But people have been decent and tolerant of my ignorance.