Student Union of the University of Oulu | 544 followers on LinkedIn. Student Union of the University of Oulu (shortened and commonly known as OYY) supervises the interests of all undergraduate degree students in the University of Oulu, Finland. We also provide students with services, such as free specialist consultation in case of academic or social problems, and publish the Oulun ylioppilaslehti student magazine. As of 2017, OYY has over 11 000 members (all the undergraduate degree students at the university of Oulu).