A History of Short Words

From the New York Times Crossword Puzzle

PSA

Sat, 15 Oct '22
Something a TV station may not earn money from, for short
Sat, 8 Oct '22
Free spot, in brief
Sun, 13 Mar '22
Smoking spot, for short?
Wed, 24 Nov '21
Nonprofit spot, in brief
Tue, 1 Jun '21
"Here's some important info ...," in brief
Fri, 5 Mar '21
Spot on advice?