A History of Short Words

From the New York Times Crossword Puzzle

SRO

Sun, 27 Mar '22
Sign of success
Mon, 21 Mar '22
Sign of a packed performance
Wed, 16 Feb '22
Sign of a packed house
Sun, 2 Jan '22
"Herc could stop a show / Point him at a monster and you're talking ___" (lyric in Disney's "Hercules")
Tue, 28 Dec '21
Sellout indicator
Sun, 21 Nov '21
Packed house inits.
Sun, 31 Oct '21
Inits. for a theatrical hit
Thu, 2 Sep '21
Sign of a hit
Sun, 7 Mar '21
Good sign for an angel