Comcast is a leading media, entertainment and communications company. It is involved in the operation of cable systems through Comcast Cable and in the development, production and distribution of entertainment, news, sports and other content through NBCUniversal. Comcast Cable is one of the largest video, high-speed internet and phone providers in the US. It is the majority owner and manager of NBC and Telemundo broadcast networks, NBCUniversal, television production operations, local television station groups, a major motion picture company and theme parks.