This Recommendation specifies functional requirements for a smart television operating system (TVOS) over integrated broadcast and broadband (IBB) cable networks. The smart TVOS is intended to be installed in an IBB-capable cable set top box (STB) and TV and to enable broadcasting and interactive services based on the Internet protocol (IP) provided by cable TV operators and third-parties. By running the smart TVOS, the IBB-capable cable STB and TV are able to intelligently provide subscribers with advanced and personalized services by downloading and installing advanced and personalized apps from the platforms of cable operators and third-parties that are interconnected with them.