PC² is the Programming Contest Control 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. It was used to conduct the ACM ICPC World Finals until 2008. As of 2009, the ACM ICPC World Finals switched to using Kattis, the KTH automated teaching tool.
Read more about PC²: Computer Programming Contests and PC², A Brief Revision History