I don’t have a source in mind but an area in the early 20th c where spoken numbers were standardized was operator-connected phone calls. I imagine the Post Office and AT&T have training materials.
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Yeah, exactly this kind of thing. I've found some of that and am hoping to look for more. But also: radio? telegraphy? Military communications? So many potential areas.
jul 26, 2025, 1:54 am • 1 0 • view
After sleeping on it, I bet you can find calling instructions in the introductory pages of local phone books (before dial phones became universal). I vaguely remember seeing a short film on how to make a call in the late 40s : early 50s.
jul 26, 2025, 1:27 pm • 1 0 • view