PSU is a three-letter abbreviation with multiple meanings, including:
* Pennsylvania State University
* Pomona State University
* Plymouth State University
* Portland State University
* Pittsburg State University
* Plattsburgh State University
* Pembroke State University
* Prince of Songkla University
* Prince Sultan University
* Puntland State University
* Pangasinan State University
* Pacific States University
* Public Surveillance Unit,
* Phantasy Star Universe,
* Playstation Universe
* Public Sector Units
* Power Supply Unit
* Practical salinity unit
Rhete
Which PSU?
LTmatt
DO YOU EVEN KNOW WHAT THAT STANDS FOR