The Shared Unique Number (SUN) System helps students identify courses that will directly transfer among Arizona’s community colleges and three public universities. Using the SUN System, students can easily search for and enroll in courses that offer direct equivalency at other Arizona colleges and universities. SUN courses have their own unique course number and prefix listed alongside each college's course number. Look for the SUN icon in your course catalog or college website or visit www.azsunsystem.com for more information.