Course Reference Numbers (CRNs) are available within each class description in the online catalog. Note that different CRNs can apply for different terms, for different student levels, and for different credit amounts, so browse CRNs carefully!
As soon as your registration time arrives, login with your CRNs written down (and approvals in place, if needed) and register.
Waitlists can be very confusing. Please read the Waitlist Guide if you find that you must place yourself on a waitlist.