HBO is an American premium cable television network that produces high-quality original content such as award-winning series and documentaries. It launched in 1972 with a mix of movies and sports, and expanded to 24/7 programming in 1981. Notable original series in the late 1990s included Oz, Sex and the City, and The Sopranos. HBO's business model relies on $1.4 billion in annual subscriber fees, and uses its premium content to build brand awareness and drive merchandise and DVD sales. In 2010, HBO launched its HBO Go streaming service to offer subscribers access to content on multiple platforms. However, Netflix has become a strong competitor, with its U.S. subscriber numbers surpassing H