Tau is a Greek letter that is used to represent the number 300 in the Greek numeral system. It is also the symbol of the fraternity TAU Kappa Epsilon, which was founded in 1899 at Illinois Wesleyan University. TAU Kappa Epsilon is one of the largest international fraternities with over 270, 000 initiated members and chapters on over 290 college campuses across the United States and Canada. The fraternity's mission is to aid men in their mental, moral, and social development for life.