A condition of enrollment consisting of what course a student is required to simultaneously take in order to enroll in another curse.

Some modules have co-requisites. This means that you have to take another specified module in conjunction with your chosen module at the same time within the academic year.

Requirements or coursework that must be completed prior to or in conjunction with enrollment in a particular course. If students have not taken the appropriate requisites, they may be required to withdraw from the course.

Modules which should be studied together.

Any other modules which students are obliged to take in conjunction with the targeted module.

Modules which must be studied concurrently by students registered on a specified course.

Courses that must be take at the same tome (i.e. GEO 100 and GEO 101).