[GreenKeys] Interesting modem for a teletype up on eBay

[Jim Haynes]

On Sun, 13 Feb 2011, Paul Heller wrote:

> Wow, nice restoration job. It is funny to see an O with the slash and a 
> ZERO without the slash. I suddenly remember that this is the exact 
> opposite of what I learned way back in engineering school.

Seems like I remember something about IBM teaching people to use a slashed
Oh and an unslashed zero, way back when they were teaching people to fill
out forms to be key punched into cards.  Whereas slashed zero I believe
can be traced to the U.S. military.