Phi Kappa Psi (ΦΚΨ), also called "Phi Psi", is an American collegiate social fraternity founded at Jefferson College in Canonsburg, Pennsylvania on February 19, 1852. There are over a hundred chapters and colonies at accredited four year colleges and universities throughout the United States. Membership is normally only granted to men who are enrolled as full-time students at a chapter's host institution. There have been three exceptions to this: