On 9 September 2016 at 17:15, Mary Ann Horton <mah(a)mhorton.net> wrote (in part):
When I was at Berkeley working on my dissertation, I
wrote a tool that would
let you edit a text file written in any language you could define with a
grammar, with syntax and semantic error checking while you edited. I had
grammars for several popular (in 1980) languages.
My curiosity is piqued. What were these languages?
N.