JTS may refer to: Alfa Romeo JTS engine, an automobile engine Java Topology Suite (JTS Topology Suite), a software library Janesville Transit System, Wisconsin, US Jakarta Taipei School, Indonesia Java transaction service, a software library Jewish Theological Seminary of America, New York City Jimmy Two-Shoes, a Canadian animated series Journal of Transatlantic Studies Journal of Traumatic Stress, US JT Storage, a d=former US hard drive manufacturer Jabhat Tahrir Souriya (Syrian Liberation Front), an Islamist group in the Syrian Civil War