PC2 is the
System developed at California State University, Sacramento
in support of Computer Programming Contest activities of the
ACM, and in particular the
ACM International Collegiate Programming Contest (ICPC) and its Regional Contests around the world.
In 1989, PC2 version 1, titled Personal Computer Programming Contest Environmental System, PC2 ES, developed as a Computer Science Senior Project at CSUS. Lots of details at The (somewhat abridged) History of PC2.