A History of Short Words

From the New York Times Crossword Puzzle

ERAT

Fri, 1 Oct '21
Part of Q.E.D.
Tue, 14 Sep '21
The "E" of Q.E.D.
Thu, 17 Jun '21
Part of Q.E.D.
Sun, 2 May '21
Part of Q.E.D.
Sat, 27 Mar '21
Form of the Latin "sum"
Tue, 2 Mar '21
The "E" of Q.E.D.