A History of Short Words

From the New York Times Crossword Puzzle

Words of five or fewer letters since August 15, 2006

oas

Sun, 3 Dec '06
Western Hemisphere grp.
Mon, 20 Nov '06
Western treaty grp.
Thu, 2 Nov '06
Intl. assn. since 1948
Tue, 19 Sep '06
Western treaty grp.