A History of Short Words

From the New York Times Crossword Puzzle

ONT

Fri, 6 May '22
Most populous Canadian prov.
Thu, 20 Jan '22
Niagara Falls locale: Abbr.
Sun, 14 Nov '21
Toronto's prov.
Tue, 27 Apr '21
Toronto's prov.
Thu, 15 Apr '21
8-Down's northern neighbor: Abbr.