AZUN is the gateway to Arizona's premier public institutions of higher education. All three participating AZUN universities, Arizona State University (ASU), Northern Arizona University (NAU) University of Arizona (UA), are accredited by the Higher Learning Commission of the North Central Association of Colleges and Schools (NCA). Arizona State University (ASU) Northern Arizona University (NAU) University of Arizona (UA). Through AZUN, you can earn a fully accredited undergraduate degree, graduate degree, or professional certification from one of our three state universities, each with a distinguished record of more than a century of excellence.