Sistem Operasi (Ilmu Komputer) -- Operating Systems (International Class)
If you are going to take the "Operating Systems" class this semester, you should start to read the ANNOUNCEMENTS of the SCELE course:
https://scele.cs.ui.ac.id/course/view.php?id=3398
The enrollment key is: XXX
Q!
See (check) also: https://os.vlsm.org/Log/