I was telling my dad about doing all my math homework on my graphing calculator. Ironically enough, the course I'm taking right now is the one he taught as the T.A. in college. (he was a math and physics major). But, that was in the 70's and they obviously didn't have calculators of any sort. In response to my calculator claim, he said: "We didn't have calculators. I had a slide rule.......I carried it in a holster on my belt." The sad thing is, I don't know if he's kidding or not...........