first consumer device I ever saw was the Microwriter, back in the 1980's .. but court stenographers have been using chorded keyboards for a century or more

- https://en.wikipedia.org/wiki/Microwriter

- https://en.wikipedia.org/wiki/Stenotype

Court stenography keyboards were not originally spelling out letters, though; they worked in shorthand symbols. I guess they can autoexpand that now.

Microwriter devices produced ASCII directly.