Comment by cromulent
4 days ago
Bravo! Apparently they are known as keyers.
https://en.wikipedia.org/wiki/Keyer#Computer_interface_keyer...
Edit: Circa 1980 when I was young and impressionable, my father's buddy had a WriteHander and since then I have loved this kind of thing.
The writehander link has an image that is clearly not a righthander user. Much more of a southpaw targeted device
"Available for either right or left hand..." - the second sentence beneath that image