8. A display system comprising: a display; and a single graphical user interface window presented on the display, comprising: a representation of a set of channels; and a representation of individual content items associated with each of the channels, wherein the individual content items include television programming, interactive data and extended content; wherein the single graphical user interface window enables a user to select individual content items associated with a displayed channel, and to select extended content; wherein if the interactive data is selected, the representation of the set of channels and the interactive data are both displayed within the single graphical user interface window; wherein the single graphical user interface window displays the representation of individual content items associated with a channel upon selection of the channel by the user, wherein the single graphical user interface window does not involve overlaying; wherein the single graphical user interface window simultaneously displays categories, channels, and content, and permits navigation in the single graphical user interface therethrough, such that a plurality of sets of channels that each correspond to a plurality of categories respectively; and wherein upon selection of a single category of the plurality of categories by the user, the corresponding set of channels of the plurality of sets of channels is displayed.
8. A display system comprising: a display; and a single graphical user interface window presented on the display, comprising: a representation of a set of channels; and a representation of individual content items associated with each of the channels, wherein the individual content items include television programming, interactive data and extended content; wherein the single graphical user interface window enables a user to select individual content items associated with a displayed channel, and to select extended content; wherein if the interactive data is selected, the representation of the set of channels and the interactive data are both displayed within the single graphical user interface window; wherein the single graphical user interface window displays the representation of individual content items associated with a channel upon selection of the channel by the user, wherein the single graphical user interface window does not involve overlaying; wherein the single graphical user interface window simultaneously displays categories, channels, and content, and permits navigation in the single graphical user interface therethrough, such that a plurality of sets of channels that each correspond to a plurality of categories respectively; and wherein upon selection of a single category of the plurality of categories by the user, the corresponding set of channels of the plurality of sets of channels is displayed. 11. The display system of claim 8 , wherein the extended content includes embedded video.