> On Apr 20, 2025, at 3:16 AM, Steve Lewis via cctalk <[email protected]>
> wrote:
>
> Well, now I'd like to see if the words "RS-232" were uttered prior to
> 1969.
Yes, the RS-232 standard existed before 1969. That year was when RS-232-C was
published, and the ‘C’ indicates it was the 3rd revision of the standard.
I found Dallas Semiconductor Application Note 83 which is a 9 page document
from around 1975 describing how RS-232 works, which mentions:
The EIA/TIA-232-E standard was introduced in 1962 has been updated four times
since its introduction in order to better meet the needs of serial
communication applications. The letter “E” in the standard’s name indicates
this is the fifth revision of the standard.
Frank
>
> Thanks again,
> -Steve
