The University of California at Berkeley is joining edX,  which was recently formed by Harvard University at the Massachusetts Institute of Technology to offer MOOCs, or massively open online courses. The Berkeley announcement comes a week after Coursera, another provider of MOOCs by elite universities, announced a major expansion.  In the announcement from edX, the three members are now referred to as the "X Universities." In a statement explaining the choice of edX, Robert J. Birgeneau, the chancellor at Berkeley, specifically noted the nonprofit model at edX. "We are committed to excellence in online education with the dual goals of distributing higher education more broadly and enriching the quality of campus-based education. We share the vision of MIT and Harvard leadership and believe that collaborating with the not-for-profit model of edX is the best way to do this," he said.