Final answer:
Without specifics, it's assumed that PSU refers to either Portland State University, which became a university in 1969, or Pennsylvania State University, which adopted university status in 1953.
Step-by-step explanation:
The question regarding the change to the name PSU is answered within the context of institutional history. PSU often refers to various public universities, like Portland State University or Pennsylvania State University. However, without specifying which PSU the student is inquiring about, the response must be general. In the case of Portland State University, it was granted university status in 1969, and this is when the PSU acronym likely became commonplace. Pennsylvania State University has been referred to as PSU after its reorganization from a college to a university-style institution in 1953. It's essential to specify which institution is being discussed for an accurate date.