[klez]

That person (Eric S. Raymond) also wrote "The Cathedral and the Bazaar"[0], a seminal work for the Open Source movement.

[0] http://www.catb.org/~esr/writings/cathedral-bazaar/

[boffinAudio]

See also, "In the Beginning Was the Command Line", which I seem to recall was also monospace presented in the good ol' days ...

https://en.wikipedia.org/wiki/In_the_Beginning..._Was_the_Co...

Or maybe it was just a plain ol' textfile, I forget.