Electives without prerequisites give you the opportunity to explore other disciplines that interest you. For example, you could enrol in a biology course from this list if you are studying in the Faculty of Arts.
See if and when a course is offered by using the course timetable tool. If it is, you can include this course in your timetable scenarios and enrol in it once the official enrolment period has begun.
If you are enrolled in a program at the Faculty of Engineering, please see the lists of complementary electives and science electives that are available to you (as per accreditation regulations).