The course catalog was, for a long time, a short inch-or-so-thick book that purported to list courses available for the coming year. It also included information for each department, graduation requirements, college regulations, and other stuff.
Oberwiki Course Catalog
Almost all classes in the College of Arts and Sciences now have pages on Oberwiki. Pages are titled the name of the course, but the code should take you there as well (e.g. AAST 074 takes you to Something From Something).
Most of the pages were created automatically, drawn from Oberlin's online course catalog. Because the HTML behind Oberlin's catalog is very inconsistent, there's bound to be errors/omissions/formatting weirdness; please correct anything you notice!
Real soon now, each department page will have a list all the courses in the department. At the moment, you can visit the department's category page (try searching for "Category:Departmentname") and look through the list there, or visit Special:SearchByRelation and search for Relation: "Course department", to: "Departmentname".