A History of Short Words

From the New York Times Crossword Puzzle

XOXO

Sun, 14 Sep '25
Love letters?
Tue, 10 Oct '23
Affectionate sign-off … or a pattern hinting at the starts of the answers to the six starred clues
Sat, 10 Sep '22
Affectionate sign-off
Thu, 10 Feb '22
Sweet sign-off