The forerunner of the NCAA, the IAAUS, was founded in 1905. At that time, the following 39 schools joined.
Allegheny College Amherst College Bucknell University Colgate University University of Colorado Dartmouth College Denison University Dickinson College Franklin & Marshall College George Washington University Grove City College Haverford College Lehigh University Miami University (Ohio) University of Minnesota University of Missouri University of Nebraska New York University Niagara University University of North Carolina Oberlin College Ohio Wesleyan University University of Pennsylvania University of Rochester Rutgers College Seton Hall College Swarthmore College Syracuse University Tufts University Union College United States Military Academy Vanderbilt University Washington & Jefferson College Wesleyan University Western University (Pennsylvania) Westminster College (Pennsylvania) Williams College Wittenberg University College of Wooster
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