My first sizable programming job in high school was with one of these, I think. A special education teacher had written an app to create a Blissymbolics <https:

My first sizable programming job in high school was with one of these, I think. A special education teacher had written an app to create a Blissymbolics <https://www.blissymbolics.org https://www.blissymbolics.org> communicator and hired me to tune it up, because some of his more prolific students had mastered more symbols than the app could readily handle. I spent quite some time with the machine, and felt it was fairly capable for the time (my reference being CBM a.k.a. PET desktops).