The Ivy League generally refers to a group of eight higher education institutions in the United States notable for their academic and often social exclusivity. The universities in the group are Brown, Columbia, Cornell, Dartmouth, Harvard, Princeton, Pennsylvania and Yale and the term 'Ivy League' originates from the athletic conference that the institutions participate in. The universities are all located in the Northeastern United States and all apart from Cornell (founded in 1865) were founded before the American Revolution. Following World War II, the universities widened their selection of students to focus on academic excellence. Cornell was the only Ivy League member to admit men and women from its founding, and Columbia was the last to become coeducational in 1983. The universities remain selective, with acceptance rates of between seven and 18 percent.