A History of Short Words

From the New York Times Crossword Puzzle

PTA

Mon, 9 May '22
School fund-raising grp.
Tue, 19 Apr '22
Org. that provides chaperones for field trips
Fri, 16 Jul '21
Home-school link, for short
Sun, 21 Mar '21
Book fair organizer, maybe, in brief
Fri, 5 Mar '21
Grp. with the motto "Every child. One voice"