In 1987, Bob Ertl’s master's thesis was titled "Narrowing the
Gap Between the Word Processing Needs of Teachers and the
Capabilities of Word Processors for Atari 8-bit Computers." As part
of that project, he created a word processor for the Atari
computers, aimed at the needs of math teachers. The word processor
is called REWRITE and was never widely available. It was only used
by a handful of teachers.
Bob has released two versions of the word processor in ATR
format, along with the Mac/65 source code and the manual. I scanned
his thesis. All of this is available at Internet Archive.
This interview took place on July 10, 2018.
"My wife would help me with this. The way she would help me is
she was patient enough to let me explain what my assembly language
code was supposed to do. So I had to say it clearly enough for her
to be able to follow it, and in doing so I was often able to find
the errors that I was looking for."