@xah_lee For your collection, part 1: Xerox 1109 LISP keyboard.pic.twitter.com/OoBsqEzkpZ
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I don’t think I really have a good answer why 0 was added first. Let me ask around. (It definitely was a gradient depending on manufacturer and country, and there was some weird situations like these, too.)pic.twitter.com/0UiTWVlIkV
(My favourite example is here, where we were still deciding whether it’s O or 0 that needed extra ornamentation!)pic.twitter.com/fGPspG0Or8
I vaguely remember reports of problems using a slashed 0 in some Scandinavian countries because it collided with a real letter: Ø.
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