Greek life at San Diego State University (SDSU) has an extensive history dating back nearly a century and has played an influential role in the university's development over time. Today it encompasses more than 40 active chapters of social and culturally-based fraternities and sororities recognized by the university, each represented through one of four governing councils. Honors, service and professional Greek-letter societies also exist and are recognized student organizations at SDSU, though they operate independently of the Office of Fraternity & Sorority Life.