A History of Short Words

From the New York Times Crossword Puzzle

PSI

Thu, 18 Apr '24
Measure of inflation, in brief
Thu, 4 Apr '24
Pressure meas.
Thu, 25 Jan '24
Three-point letter you won't find in Scrabble?
Tue, 23 Jan '24
Greek letter shaped like a pitchfork
Mon, 20 Nov '23
Greek letter after chi
Tue, 26 Sep '23
Letter before omega
Sat, 22 Jul '23
Measure of inflation: Abbr.
Wed, 19 Apr '23
Inflation measure, in brief
Tue, 21 Mar '23
Penultimate Greek letter
Tue, 21 Feb '23
Next-to-last Greek letter
Fri, 9 Dec '22
Abbr. at a pump
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.