On Collaboration, E-Mail, and the Discman
A parallel between antiquated tools.

If you're of a certain age, then you remember the Sony Discman. (Yes, showing my students a picture of one never ceased to bewilder them.) I'll assume that you don't. It looked like this:

I could explain what it did (or still does if you own one), but I'll cede my time to the inimitable Gary Gulman.
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