You can manage which Departments show up in your Department Picker on your front end website through Core. 

As a Platform Manager:
  1. Navigate to Academics > Scheduling > Requests and Schedules > Departments & Courses. 
  2. To the right of the Department you want to show or hide, click the pencil/Edit icon.
  3. Mark or unmark the Publish to Front End checkbox.
  4. Click Save & Close.

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