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Comment by nine_k | Hacker News Reader

The killer feature of a chorded mechanical (not on-screen) keyboard for me is that one can use it without having to look at it. To literally touch-type (not necessarily text).

This is why such keyboards are used where this advantage is material, e.g. in jet fighters.

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The most successful chorded keyboard of all time is the Perkins keyboard used to produce braille. If you already know braille, it's much quicker to learn than touch typing on a regular keyboard because they keys correspond directly to dots in the braille character cell.

And surprisingly, this advantage of not having to look at it also applies blind smartphone users, who can use an on-screen Perkins keyboard as an input method. The touch targets are large enough that you can use it without seeing them once you get used to where they are.

https://www.perkins.org/resource/using-braille-input-your-id...

Not that I’ve seen a blind user using Perkins in real life, but the videos I’ve seen all seem to demonstate the “screen away” mode referenced in this article: turn the phone away from you but cradled in two hands, position your fingers on the screen in roughly the correct position, then you’re ready to start typing. To a blind user, the screen becomes the operating mechanism, and the perception mechanism is typically headphones.

Yes exactly. It's more of a way to make use of many of the other pre-existing functions of the smartphone without having to have a purpose built device. Although there is at least one hardware addon i'm aware of for blind users:

https://www.iamhable.com/en-am

You can learn to touch-type on any keyboard and never ever look at it (actually gets confusing to look), and many where you never have to move your hands around either, before you need to get anywhere near chordal.

> (actually gets confusing to look)

As someone who grew up with a Swedish keyboard layout, switched to US when I got a job as a programmer but live in Spain so most keyboards have Spanish physical layouts while I use US software layouts: yes, this is very true for a lot of us :)

True, especially for ergonomic keyboards.

The upside of a chorded keyboard is that it can input a lot while using just one hand, and can be fixed relative just to that hand (imagine e.g. typing while holding a bike handlebar, or, again, an aircraft control stick). Normal touch-typing requires active use of two hands, and a steady surface.

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