Abstract: A system for auditing event data includes an interface and a processor. The interface is configured to receive an audit query request and a client key. The processor is configured to determine whether the audit query request is valid; determine whether a chain of events is stored in an audit store, wherein the chain of events is associated with the audit query request; and in response to determining that the chain of events is stored in the audit store, provide data for the audit query request.

Abstract: A system for committing event data includes an interface and a hardware processor. The interface is configured to receive modified input data for desired events. The hardware processor is configured to retrieve the desired events from a desired aggregate; select requested event to modify from the desired aggregate; replace input data of the requested event with the modified input data to create a modified aggregate; replay events of the modified aggregate N to generate a new state of aggregate N; and provide the new state of aggregate N.

Abstract: A display device and a method are provided. The display device includes a network interface connected to a network; an internal storage configured to store at least one content; a display; and a processor configured to control the display to display, in a first area of a user interface (UI) screen, a category list, including a video category and a photo category, to enable selection of one category from the list, and control the display to display, in a second area of the UI screen, at least one thumbnail image corresponding to at least one content stored in at least one external device connected through the network interface and at least one thumbnail image corresponding to the at least one content stored in the internal storage.

Abstract: A display device and a method are provided. The display device includes a network interface connected to a network; an internal storage configured to store at least one content; a display; and a processor configured to control the display to display, in a first area of a user interface (UI) screen, a category list, including a video category and a photo category, to enable selection of one category from the list, and control the display to display, in a second area of the UI screen, at least one thumbnail image corresponding to at least one content stored in at least one external device connected through the network interface and at least one thumbnail image corresponding to the at least one content stored in the internal storage.

Abstract: A user terminal device is provided. The user terminal device includes a network interface unit for connecting to a network; a storage unit for storing content; a control unit for operating in local mode to search for content from the storage unit or network mode to search for content from the network in response to a user's selection; and a display unit for displaying the local mode User Interface (UI) or the network mode UI in accordance with whether the control unit is operating in the local mode or the network mode, respectively.

Abstract: A method for controlling a renderer of a user terminal device includes selecting a renderer which shares contents, transmitting contents to the selected renderer, displaying a control User Interface (UI) including an object image of which position moves according to a user's touch manipulation, and performing a control operation which controls the renderer in accordance with movements of the object image on the control UI. Accordingly, renderer operations can be easily controlled.