I love that this extends to the modern software keyboard where the shift key is now an actual arrow pointing to the metaphoric 'upper case'.https://twitter.com/roaringgirle/status/916714059965390848 …
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And they got weird symbol pushback in America, so eventually IBM switched to arrow for Europe, “Shift” for America, and then a hybrid.pic.twitter.com/6KRIDSZJkS
So, the arrow might have really just stood for “look at the key legend higher up,” never related to the mechanical roots of shifting.
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