We had a few sets of these in my high school in the late 90s. English instructors would hand them out for essay writing, and you could plug them into the PS/2 o

We had a few sets of these in my high school in the late 90s. English instructors would hand them out for essay writing, and you could plug them into the PS/2 or ADB ports on the full size computers in the lab to dump your early drafts into a full-time featured word processor for markup and formatting. Probably cut down on the number of computers they needed per student as most didn't yet know how to touch-type yet. Anyone who had fine motor function difficulties was given one for daily writing tasks as well.