A History of Short Words

From the New York Times Crossword Puzzle

CCED

Sun, 3 Sep '23
Listed below a recipient, maybe
Wed, 14 Dec '22
Kept in the loop, in a way
Mon, 21 Nov '22
Included on an email, briefly
Sun, 8 May '22
Added to a thread, say
Thu, 17 Feb '22
Kept informed, in a way
Fri, 23 Jul '21
Looped in, in a way
Mon, 19 Jul '21
Included in an email, in brief