· Wiktionary | roger [U]sed circa 1940 in UK and US military communication to represent "R" when spelling out a word. "R" is the first letter in received, used to acknowledge understanding a …
· Wiktionary | roger [U]sed circa 1940 in UK and US military communication to represent "R" when spelling out a word. "R" is the first letter in received, used to acknowledge understanding a …