Files with ROZ extension contain timetable data and are associated with ascTimetables application,a scheduling tool developed by ASC Software. The application is available in 173 countries and used by more than 150 000 schools around the world.

ROZ timetable files store school schedules created by teachers. ROZ files are created by ascTimetables based on input data supplied by the user, which are passed to an algorithm that generates daily and weekly schedules for students and teachers.