I'll talk about universities' classification systems.The students in university can be classified different ways but in METU the students are divided into section accourding to their surnames' first letters.I think this way isn't so good. Because, I think the students can choose their class friends by themselves. The students in METU also can be categorized upon their ages, genders or their departments. As I know some universities use distinct ways. For example, in Ege university studens are classified accourding to their scores. Maybe there are various ways for this but I don't know the other ways so there isn't anything I want to say. See you next week.