Abstract: A server system subscribes a first user of a first client device, in communication with the server system, to a specified stream of content feeds, where the specified stream of content feeds was defined by a second user at a second client device and comprises one or more other streams of content feeds, a respective stream of the one or more other streams of content feeds was defined by a third user at a third client device and comprises two or more content feeds, and each content feed comprises a set of content items published by a respective publication source. Pursuant to the subscription of the first user to the specified stream of content feeds, the server system sends to the first client device for presentation to the first user content items associated with the specified stream of content feeds.

Abstract: At a client device, a user subscribes to a specified stream, where the specified stream includes one or more other streams. A respective stream of the one or more other streams includes two or more content feeds, and each content feed includes a set of content items published by a respective publication source. The client devices presents to the user (e.g., on a display of the client device) content items associated with the specified stream. In some embodiments, streams can be recursively defined to include combinations of other streams, and users who subscribe to a recursively defined stream receive content items from the content feeds associated with that stream.

Abstract: A client-side application (such as a browser, a browser plug-in, a browser toolbar plug-in, etc. on an end user's computer) is used to support the serving of content-relevant ads to the client device. The client-side application may provide such support by sending document information (such as a document identifier, document content, content relevance information, etc.) to a content ad server. The client-side application may also be used to combine content of the document and the content-relevant ads. For example, the client-side application may combine content of the document and the ads in a window (e.g., in a browser window), may provide the ads in a window above, below, adjacent to a document window, may provide the ads in “chrome” of the browser, etc.

Abstract: A client-side application (such as a browser, a browser plug-in, a browser toolbar plug-in, etc. on an end user's computer) is used to support the serving of content-relevant ads to the client device. The client-side application may provide such support by sending document information (such as a document identifier, document content, content relevance information, etc.) to a content ad server. The client-side application may also be used to combine content of the document and the content-relevant ads. For example, the client-side application may combine content of the document and the ads in a window (e.g., in a browser window), may provide the ads in a window above, below, adjacent to a document window, may provide the ads in “chrome” of the browser, etc.

Abstract: A user may subscribe to a content feed group that includes a set of content feeds. The content feed group includes a first set of content items from the set of included content feeds. The content items are presented in response to a subscription to the content feed group. After a change to a content feed group, such as an addition or a removal of a content feed from the set, a second set of content items, reflecting the changed set of content feeds, are presented.

Abstract: At a system remotely located from a client retrieves, for each of a plurality of content feeds, a currently published set of content items for a respective content feed, and merges the retrieved content items into a previously stored set of previously published content items for the respective content feed. A database storing content items for the respective content feed includes both the currently published set of content items and historical content items no longer published by the respective content feed. In response to a request from the client, the system transmits to the client an ordered list of content items for a specified stream. The specified stream corresponds to one or more content feeds, and the transmitted content items include at least one historical content item for at least one of the content feeds corresponding to the specified stream.

Abstract: At a client device, a user subscribes to a specified stream, where the specified stream includes one or more other streams. A respective stream of the one or more other streams includes two or more content feeds, and each content feed includes a set of content items published by a respective publication source. The client devices presents to the user (e.g., on a display of the client device) content items associated with the specified stream. In some embodiments, streams can be recursively defined to include combinations of other streams, and users who subscribe to a recursively defined stream receive content items from the content feeds associated with that stream.