A History of Short Words

From the New York Times Crossword Puzzle

MBAS

Fri, 11 Mar '22
Many Kellogg School grads
Mon, 29 Nov '21
Degs. for entrepreneurs
Fri, 12 Nov '21
Ones who'll manage somehow?
Mon, 4 Oct '21
Degrees for C.E.O.s
Fri, 1 Oct '21
Some corporate holdings, for short?