The Deutsches Symphonie‐Orchester Berlin is an orchestra based in Berlin, Germany. It was founded in 1946 by American occupation forces as the RIAS‐Symphonie‐Orchester (RIAS being an acronym for "Rundfunk im amerikanischen Sektor" / "Radio In the American Sector"). It was also known as the American Sector Symphony Orchestra. The first principal conductor was Ferenc Fricsay. In 1956 the orchestra was renamed the Berlin Radio Symphony Orchestra (Radio‐Symphonie‐Orchester Berlin). In 1993 the orchestra took on its present name.