ÖSS was first introduced in late 1960s to replace individual university selection. In 1980, ÖSS and ÖYS exams were introduced, with ÖSS covering ninth grade. ÖYS placed students to universities after ÖSS results were evaluated
YKS is a university entrance exam for final-year high school students. Exam consists of three sessions: TYT, AYT, and YDT. Registration occurs between February and March each year