Broadcasting is the distribution of audio and video signals - programmes - to a
number of listeners or viewers that belong to a large public group.
Broadcasting - information flow from the few to the many
Narrowcasting - information flow from the few to the few
Internet - information flow across traditional boundaries from the many to the many
Television and radio programmes are distributed through carrier wave and digital
broadcasting via satellite or cable.
Broadcasting via the Internet is webcasting. In
2004 a new phenomenon occurred when a number of technologies combined to produce Podcasting,
which is an asynchronous broadcast/narrowcast
The term "broadcast" was coined by early radio engineers, and is
chosen from the practice in farming, where the method of spreading seed using a wide
toss of the hand is a broad cast.