A History of Short Words

From the New York Times Crossword Puzzle

TTYL

Sun, 5 Jun '22
"Chat another time!" in an I.M.
Sun, 24 Apr '22
"Bye 4 now!"
Wed, 10 Nov '21
Texter's sign-off
Fri, 10 Sep '21
"G2G"
Thu, 22 Jul '21
Texter's farewell