A History of Short Words

From the New York Times Crossword Puzzle

FWD

Sun, 7 Jan '24
Email chain abbr.
Sun, 12 Feb '23
Chain email abbr.
Sun, 15 Jan '23
Subject line abbreviation
Wed, 18 Aug '21
Repeated string in a chain letter subject line
Tue, 10 Aug '21
Send on, as an email: Abbr.