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Channels
Channels are the way in which push media deliver content. In Netscape's Netcaster, content can be brought onscreen without reloading the page or redrawing the whole screen. One interesting feature of the layer tag is the ability to change the source dynamically. For example, the Wired News section of the HotWired channel keeps one layer filled with the latest Wired News summary and reserves another for loading any story selected by the user.