The San Francisco Symphony (SFS), founded in 1911, is an orchestra based in San Francisco, California. Since 1980, the orchestra has performed at the Louise M. Davies Symphony Hall in the City's Hayes Valley neighborhood. The San Francisco Symphony Youth Orchestra (founded in 1981) and the San Francisco Symphony Chorus (1972) are part of the organization. Its current music director is Michael Tilson Thomas, who has held the position since September 1995. 　　When the San Francisco Symphony Orchestra was founded in 1911, its first music director, Henry Hadley, began the tradition of "pops" concerts, devoted to lighter classics and special arrangements of music from operettas, musicals, and popular tunes. With the completion of the Civic Auditorium in 1915, most of the "pops" concerts were held in that 10,000-seat auditorium. Eventually, municipal taxes helped to keep ticket prices very affordable. 　　Arthur Fiedler of the Boston Pops Orchestra was invited by music director Pierre Monteux to lead the Pops Orchestra, which Fiedler did from 1951 to 1978. Besides the regular concerts in the Civic Auditorium, Fiedler led annual performances at Sigmund Stern Grove, as well as occasional performances at Stanford University's Frost Amphitheater and Oakland's Paramount Theatre. 　　While the SF Symphony does not have a specific pops orchestra today, they present pops genre programming periodically throughout the year, particularly in the summer months, with most concerts occurring at Davies Symphony Hall. They also present an annual 4 July concert at the Shoreline Amphitheatre.