[GreenKeys] Slashed zero on Teletypes

[Cory Heisterkamp]

That's been my experience as well; IBM went with the slashed letter O while the rest of the industry went with slashed zero. What's interesting is I have two Model 33's here, each with their own variation. Wish I knew where these were originally used... -C


On May 19, 2015, at 4:40 PM, David Christ wrote:

> Norwegian and Danish use a slashed O similar to a slashed zero.  Not with a horizontal bar.  One of three additional vowels in their alphabet.  Effectively an O umlaut.
> 
> As for slashed O, I can’t cite a reference but IBM core dumps started out as one and zero.  So when alphabetic characters showed up the O was slashed for differentiation from zero in output.  Teleprinter output was mainly for text so that is probably why a slashed zero was used.
> 
> This is based on memories from over 50 years ago so I am quite willing to be corrected.
> 
> David K0LUM
> 
> 
> On May 19, 2015, at 4:07 PM, tony.podrasky <tony.podrasky at gmail.com> wrote:
> 
>> GA OMs;
>> 
>> Who knows WHY there would be a slashed "O"?
>> 
>> I've seen an "O" with a horizontal bar thru it, as
>> some (Nordic?) countries have that character in their
>> alphabet.
>> 
>> UE,
>> K2EAA - TONY
>> NNNN
>> ZCZC