Posted on taht other thread, by MineralMan:
"The IBM Executive typewriter, available at that time, created documents with proportional spacing. The military had lots and lots of them.
I know this, because about the time these memos were supposed to have been written, I used an IBM Executive to typeset the body text for a small magazine I published at the time.
This argument won't fly.
Does anyone know if it had superscript capabilities like those seen in the first doc?