Abstract: Disclosed are methods, apparatus, systems, and computer readable storage media for interacting with one or more data objects in an online social network. A user interface includes a publisher with a custom action. The custom action is defined in accordance with custom action instructions provided by a first entity via an application programming interface (API). Such custom action instructions may declaratively or programmatically define the data object, the interaction to be performed with the data object, and other attributes associated with the custom action. A user may request to interact with the data object via selection of the custom action by a second entity. Information may be submitted through the publisher to interact with the data object to update a database system associated with the data object. A feed item may be presented for inclusion in the information feed based on the update.

Abstract: The single package three channel audio signal amplifier has three amplifier channels which may be used independently to power three output loads or audio speakers or may be paralleled or bridged to increase power to one or two output loads. The integrated circuit is particularly useful for current computers which use audio devices that require signals to be processed by computer circuit boards that have power limitations. The signal amplifier allows switching between one, two and three channel operation. In addition the new device uses class D operation amplifiers which are coupled to the load by ratio transformers to provide increased efficiency and gain. The device has internal limiting and preamplifier control; allows volume adjustment, filter level and range selection, and mute and treble control; and provides on-device voltage regulation.