Abstract: An apparatus, which is configured for external operation of a computer program or application installed into a computerized device, includes a reader tray and a plurality of tag modules. The reader tray, having a plurality of identification areas, includes a reader module and a communication module for communicatively connecting to the computerized device that stores and executes the computer program or application. Each of the tag modules stores one or more predetermined tag information, wherein when the tag modules are selectively placed on the identification areas, the reader module reads the tag information of the tag modules to generate an output signal in response to a location sequence of the tag modules for operating the computer program or application through the communication module.