Sigma Theta Tau International, Honor Society for Nursing, was founded in 1922 by six nursing students at Indiana University. The founders chose the name from the initials of the Greek words Storga, Tharos, and Tima, to mean love, courage and honor. The organization is the second largest of its kind in the United States and among the five largest and most prestigious in the world. The Society exists to:
Currently , there are 322 chapters and more than 160,000 members. Membership is conferred only upon nursing students in baccalaureate or graduate programs who demonstrate excellence in nursing or upon qualified bachelors, masters, and doctoral graduates who demonstrate exceptional achievement in the nursing profession. Eligibility requires that each potential member have at least a 3.0 cumulative grade point average on a 4.0 scale and be in the top third of the graduating class. The local chapter of Sigma Theta Tau, Xi Alpha, meets one time each semester, and the Board meets on an ad hoc basis.