Hi Serge:
> O = Out of Circuit
> I = In Circuit
>
> Note: while many people believe the symbols are O & 1, they are in fact
> O & I
IEC 60417 Symbols 5007 and 5008 are neither:
the numbers 1 and 0, nor
the letters I and O.
They are the symbols depicted in the 60417 drawings,
specifically a vertical line and a circle.
My comment is that the ETYMOLOGY of the 5007 and 5008
symbols are the numbers one and zero.
Best regards,
Rich
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