A History of Short Words

From the New York Times Crossword Puzzle

PSI

Sun, 23 Oct '22
No. listed on the inside of car doors, often
Fri, 16 Sep '22
Wave function symbol
Thu, 4 Aug '22
Inflation spec
Mon, 4 Jul '22
This Greek letter: ?
Thu, 23 Jun '22
Letter resembling Indiana University's logo
Sun, 19 Jun '22
Three-pronged letter
Thu, 14 Apr '22
Pitchfork-shaped letter
Sun, 24 Oct '21
Trident look-alike
Sat, 29 May '21
Inflation stat, for short
Tue, 4 May '21
... phi, chi, ___, omega
Tue, 27 Apr '21
Letter before omega
Thu, 8 Apr '21
Inflation fig.