Remember those? I just used one, on the third floor, Madison building, Library of Congress, by the elevators in the blue corridor—the Library's not just archiving books, it's archiving obsolete technologies.

A friend from my last job collected obsolete technologies. He had an abacus in his office, and many computers at home that I had never heard of. I donated an IBM hexadecimal calculator that my Dad gave me when he no longer needed it for his duties at IBM. Maybe I should have sold it instead, but who knew there was a market for these things?