If I am taking a class that is a pre-requisite, how will an S/U impact my ability to register for the next class?

Some courses require a set letter grade in the pre-requisite for it to count. An S/U grade could negatively impact your academic progress in that degree program. It is important for you to consult with your faculty advisor and/or graduate program director to understand the impact of the S/U election on required pre-requisites.