Comcast Corporation is a cable operator involved in three principal lines of business: cable, through the development, management and operation of broadband communications networks; commerce, through QVC, its electronic retailing subsidiary; and content, through its consolidated subsidiaries Comcast Spectacor, Comcast SportsNet, Comcast SportsNet Mid-Atlantic, Comcast Sports Southeast, E! Entertainment Television, The Golf Channel, Outdoor Life Network, G4 Media, and through other programming investments