A History of Short Words

From the New York Times Crossword Puzzle

IRT

Thu, 26 Dec '24
Original N.Y.C. subway line
Sun, 26 Jun '22
N.Y.C. subway inits.
Fri, 11 Feb '22
N.Y.C.'s first subway line
Sun, 14 Mar '21
Old N.Y.C. subway inits.