Patent ID: 8473853

Claim:
A computer system comprising: a data processing apparatus including a first display screen, a first user input device, and a processor configured to be coupled to the first display screen and the first user input device, the processor configured to provide a graphics user interface including one or more operation selection icons on the first display screen; and a first display device configured to communicate with the data processing apparatus, the first display device including a second display screen, wherein the processor is further configured to apply a first operation with respect to the second display screen in response to a selection of a first operation selection icon on the graphics user interface using the first user input device, wherein the first display device is configured to be operably detached from the data processing apparatus and invoked as a working screen, wherein the first display device includes an application stored on local memory, and wherein the application is configured to locally store and process input that is received when the first display device is detached from the data processing apparatus so that, responsive to the first display device being reattached to the data processing apparatus, the input stored on the local memory on the first display device can be further processed using the data processing apparatus.