A History of Short Words

From the New York Times Crossword Puzzle

KEY

Sun, 31 Dec '23
It's got all the answers
Thu, 21 Dec '23
Middle C, e.g.
Wed, 26 Apr '23
Critical
Wed, 19 Apr '23
Critically important
Wed, 22 Feb '23
Shift or Enter
Tue, 21 Feb '23
Anthem lyricist with a musical name
Thu, 10 Nov '22
Enter, for one
Tue, 8 Nov '22
It jingles on a janitor's ring
Tue, 11 Oct '22
It has all the answers
Sun, 11 Sep '22
Development in cryptography
Tue, 16 Aug '22
Item that might be hidden under a front door mat
Sat, 4 Jun '22
Partner of 53-Down
Mon, 16 May '22
Piano part
Sun, 24 Apr '22
Very important
Wed, 29 Sep '21
Type (in)
Thu, 16 Sep '21
Score specification
Sat, 3 Jul '21
See 7-Down
Tue, 4 May '21
Symbol of ownership
Sun, 4 Apr '21
Crucial