A television network is a network to provide television programming to many television stations. It is almost always a large company. Until the mid-1980s, television programming in most countries of the world was mainly done by a small number of broadcast networks. Many early television networks (for example, the BBC, NBC or CBS) began as radio networks.
A television network may broadcast many television channels. For example, BBC is a television network. It broadcasts its programmes on many different channels including BBC One, BBC Two, BBC Parliament and CBBC. Each channel will often have a group of programmes that are similar in some way. For example, CBBC broadcasts childrens programmes