A History of Short Words

From the New York Times Crossword Puzzle

PAAR

Sun, 11 Sep '22
Jack of old TV
Wed, 8 Jun '22
Jack of 1950s TV
Tue, 21 Dec '21
Talk show host Jack
Tue, 20 Apr '21
Jack who pioneered late-night talk
Mon, 28 Dec '20
Jack who once hosted "The Tonight Show"