A History of Short Words

From the New York Times Crossword Puzzle

IMS

Sun, 10 Apr '22
Contacts quickly, in a way
Sun, 6 Feb '22
Sends a Telegram, in brief?
Sat, 8 Jan '22
Pings, maybe
Sat, 19 Jun '21
Contents of some chats, in brief
Thu, 25 Feb '21
Some exchanges via AOL, once