Oh, I think I know that one.
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Replying to @mwichary @mattlaschneider
They needed smaller (literally) symbols on same keys, because they would only have to configure the impression force for each key.
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Replying to @mwichary @mattlaschneider
For example, typing in [.] needs less force to appear the same than typing in [8].
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Replying to @mwichary @mattlaschneider
Too much force on [.] would make a hole in the paper, and so on.
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Replying to @mwichary @mattlaschneider
So on Electromatic they just moved smaller symbols together. There’s a key with ['"], and a key with [-_]. I think the rest followed…
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Replying to @mwichary @mattlaschneider
…including [2@] being where it is.
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Replying to @mwichary @mattlaschneider
I am guessing that [2"] on a keyboard today means they skipped the electric typewriter revolution, or arrived at it later…
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Replying to @mwichary @mattlaschneider
…where the force thing was solved, or irrelevant.
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Replying to @mwichary
Thank you so much! This has been nagging at me for years!
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Teletypes split off of typewriters before they became electric, so we had two separate paths they eventually needed to be reconciled.
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Replying to @mwichary @mattlaschneider
(Somewhat similarly to calculator keypads and telephone keypads unexpectedly coexisting on smartphones now, with different layouts.)
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Replying to @mwichary
Haha, yeah, the family trees of everyday objects are the weirdest things
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