the Sam Cooke song "Wonderful World" came on the radio ("Don't know much about history", etc.). I heard the line "don't know what a slide rule is for", and asked Jackie if she knew what a slide rule was. She of course said no, so then I had to try to explain what it was. Which proved difficult. I finally settled on describing it as a stick with mathematical tables on it, that people used for calculations. She asked, weren't there calculators? And it struck me that, no, when I was in high school, we DIDN"T have calculators, and the only people who did were scientists or engineers, and they cost more than a thousand dollars each.
I told Jackie this, and she said, wow, you're old.
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