A History of Short Words

From the New York Times Crossword Puzzle

AARP

Tue, 21 Sep '21
Org. for seniors
Thu, 3 Jun '21
Influential D.C. lobby
Tue, 20 Apr '21
Org. with 50+ members
Thu, 18 Mar '21
Grp. that sends you a card for your 50th birthday
Fri, 29 Jan '21
50+ group