Complex sentence: Raskin later enrolled in a graduate music program at the University of California, San Diego (UCSD), but stopped to teach art, photography and computer science there, working as an assistant professor in the Visual Arts department from 1968 until 1974.
Split into simpler sentences: Raskin later enrolled in a graduate music program at the University of California, San Diego (UCSD), but stopped to teach art, photography, and computer science there. He worked as an assistant professor in the Visual Arts department from 1968 until 1974.