Webcasting is the term applied for using the internet to broadcast audio or video transmissions. Typically, a single content file can be reached to multiple simultaneous listeners or viewers. The distribution may be done either live or on demand. A computer network is used for this purpose. The process usually involves the use of a webcam. The largest “webcasters” include existing radio and TV stations, who “simulcast” their output through online TV or online radio streaming, as well as a multitude of Internet only “stations”. The term webcasting usually refers to non-interactive linear streams or events. Rights and licensing bodies offer specific “webcasting licenses” to those wishing to carry out Internet broadcasting using copyright material.