Boston Symphony Orchestra, Inc (BSO) is the largest orchestral organization in the world and one of the largest performing arts organizations in the United States, presenting more than 250 concerts annually. The organization includes the Boston Symphony Orchestra (Andris Nelsons, Music Director), Boston Pops (Keith Lockhart, conductor), Symphony Hall in Boston (widely regarded to be one of the top concert halls in the world for its acoustics) and Tanglewood, the BSO's internationally renowned summer music festival in  Lenox, Massachusetts.