A History of Short Words

From the New York Times Crossword Puzzle

HASHTAG

Thu, 28 Jul '22
Character that's popular on social media
Fri, 1 Jul '22
Something to follow on social media
Mon, 19 Jul '21
#, in social media
Mon, 12 Apr '21
#, on social media
Fri, 22 Jan '21
It shares a key with a "3"