A History of Short Words

From the New York Times Crossword Puzzle

OSS

Fri, 22 Apr '22
Where Wonder Woman first worked: Abbr.
Sat, 25 Sep '21
W.W. II spy grp.
Mon, 13 Sep '21
C.I.A. forerunner
Thu, 25 Feb '21
Forerunner of the C.I.A.