On Mon, Apr 13, 2020 at 11:29:07AM -0400, Arthur Krewat wrote:
>I slash my 0's, but that's it, having always had TECO on a PDP-10 
>with an LA36 to start with.
>
>I remember a lot of my math teachers that had ZERO experience with a 
>computer marking up things as you describe. Z, 7, 0 (zero), etc. 
>Maybe mathematical formulas were the origin?
>

When I was a student, I once cheated during an exam (I know, I'm 
ashamed) by giving the answer to my neighbor and friend: I gave 
him the good answer, which was a "0" (zero). My friend got a bad 
grade, since he read "ø", the symbol for "empty set".

Pierre