[SLJ7]

That's a wide spectrum. Not understanding that gmail isn't email is well into "How do you not know this?" territory. Whereas only very specific users know about Bash and Emacs. I do often have that experience of needing to climb 47 levels upward to successfully explain something to someone. Right now I'm just intrigued by the fact that I can go out into my neighbourhood and nobody will know what 90% of these things are, yet I'm probably far from the only person on this forum who recognizes and has experience with the vast majority of that list.