I always thought the Prof. Michael Harrison and his group in the
CS Dept. at UC Berkeley were the first to do this. I found a reference
to this in
https://books.google.com/books?id=IToEAAAAMBAJ&pg=PT7&lpg=PT7&dq=michael++harrison+berkeley+postscript+fonts#v=onepage&q=michael%20%20harrison%20berkeley%20postscript%20fonts&f=false