In article , "Ian White, G3SEK"
writes:

Avery Fineman wrote:
The dit-dah-dit of "R" has a nice little pattern to it and
is intuitive for that. It continued on into radio after 1896..."R"
meaning
"okay" or "all right."

"R" takes on extra significance in meteor-scatter and moonbounce
communication. Meteor-pings can be so fleeting, and moonbounce is
generally so weak, there have to be specialist QSO procedures.

Roger that, Ian. :-)

I meant no disrespect for moonbouncers or scattered scatterers, was
just ruminating on the mass of jargon and phrases that have become
commonplace in radio communications in many radio services, both
civilian and government. "Roger" as an affirmation word has been
with us for six decades and seems entrenched as an equal to "okay"
over radio.

Using "roger" instead of the word "okay" (common in several
languages, not quite as common as "hamburger") seems a sort of
tribal speak kind of exclusive jargon. The same with vocalized "73"
instead of saying just "best regards." Same number of syllables
and takes about the same time to pronounce. :-)

Len Anderson
retired (from regular hours) electronic engineer person