A History of Short Words

From the New York Times Crossword Puzzle

SGTS

Tue, 16 Apr '24
Pepper and O'Leary of classic rock: Abbr.
Wed, 18 Oct '23
Pepper and others: Abbr.
Tue, 1 Mar '22
Some NCOs
Mon, 15 Nov '21
Superiors to cpls.
Sun, 22 Aug '21
They know the drill: Abbr.