[GreenKeys] FTGH Mite keyboard

[Jim Haynes]

On Mon, 2 Nov 2020, Duncan Brown wrote:
> There are a lot of variations in the upper case letters of 5-bit TTYs. But 
> Western Electric was using upper case "S" for "BELL" in 1919 and all the US 
> military machines I've seen use upper case "S" for BELL.  Somebody used upper 
> case "J" for BELL, but I've never seen upper case "G" used for BELL.

S for Bell System and U.S. military and most other users.  J for Western
Union.

The origin of this is that in the early days Associated Press decided
they wanted two different bell signals, one to ring at the machine and
the other to operate a contact to ring a remote bell or flash a light
in an editor's office.  So that was done but eventually went away and
for some reason W.U. and the rest of the world disagreed about which
character should ring the bell.  A chart for International Telegraph
Alphabet #2 shows J bell as standard and S bell as U.S. variant.