Due to a scheduling conflict, the location for Computer Systems had not been announced yet. This schedule should hopefully be the final one.
A&R Schedule 1st Semester 18-19
Edit: Please note that you may need to register for a german course of the university (here: http://www.zhb.tu-dortmund.de/fs2/Anmeldung/index.php) in addition to the courses in the table if you do not have a german certificate yet.