the origin of the ⌘ symbol - http://blog.jaredsinclair.com/post/121299215660/origin-of-the-cmd-symbol … (via @mwichary)
@timhwang This seems like it might be your kind of thing: http://www.maths.ed.ac.uk/~aar/papers/cajorinot.pdf … (History of Mathematical Notation, out of copyright)
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@michael_nielsen Well, looks like you just decided what I’m doing with my Saturday night.Thanks. Twitter will use this to make your timeline better. UndoUndo
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