This is a great list of many of the things that our kids will never know about. We can find a few gaps, like the “auto-reverse” function of a Walkman. But that’s really more of a subcategory to number 3, “Playing music on an audio tape using a personal stereo.” But let’s take a moment to honor auto-reverse as a huge advance in personal stereo technology. It meant that you didn’t have to bother actually turning a tape over to hear the other side. Genius. At the time. Thanks GeekDad.