Final answer:
The oldest continuously running student organization at the University of Chicago is the Model United Nations, founded in 1927, making it the oldest Model UN program globally.
Step-by-step explanation:
The longest continuously running student organization at the University of Chicago of its kind is the Model United Nations (A). Founded in 1927, the University of Chicago Model United Nations (UCMUN) is not only the oldest Model UN program in the world but also one that has a rich tradition of excellence and influence in the Model UN community. This organization provides students with the opportunity to simulate United Nations committees and debate on a variety of global issues, thereby enhancing their understanding of international relations and diplomacy.