MSU

Short definition from Wiktionary

Noun

1. 1
   Initialism of Microsoft Update.

Proper noun

1. 1
   Initialism of Michigan State University.
2. 2
   Initialism of Mississippi State University.
3. 3
   Initialism of Mindanao State University.
4. 4
   Initialism of Missouri State University.
5. 5
   Initialism of Montana State University.