To search on multiple departments that are not in sequential order, PC
users hold down the control (CTRL) key, Mac users hold down the open apple
key while selecting each department (CTRL, AFAM, and CTRL, ANTH, will
return courses in AFAM and ANTH). Holding down the Shift key will
highlight multiple departments in a row (SHIFT, AFAM, and SHIFT, ANTH,
will return all courses in AFAM, AFST, ALIT, AMST and ANTH)".