Cable television, or CATV, is a television distribution method in which signals from distant stations are received, amplified, and then transmitted by (coaxial or fiber) cable or microwave links to users.

Cable television originated in areas where good reception of direct broadcast TV was not possible, but CATV now also consists of cable distribution systems to large metropolitan areas in competition with direct broadcasting.

A cable system is a localized communications network that distributes television, Internet, and telephone services by means of coaxial cables and/or fiber optics.

Primary level or levels of cable service offered for subscription. Basic cable offerings may include retransmitted broadcast signals as well as local and access programming. In addition, regional and national cable network programming may be provided. Basic service offerings at the system level may be offered as more than one tier.

Channels set aside by a cable operator for use by third parties, including the public, educational institutions, local governments, and commercial interests unaffiliated with the operator.